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Classification Resources
 
Class   123INTERNAL-COMBUSTION ENGINES
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[List of Pre Grant Publications for class 123 subclass 1R][List of Patents for class 123 subclass 1R]  1R MISCELLANEOUS
[List of Pre Grant Publications for class 123 subclass 2][List of Patents for class 123 subclass 2]2 COMBINED DEVICES
[List of Pre Grant Publications for class 123 subclass 200][List of Patents for class 123 subclass 200]200 ROTARY
 [List of Pre Grant Publications for class 123 subclass 201][List of Patents for class 123 subclass 201]201 Subclass 201 indent level is 1 Reversible
 [List of Pre Grant Publications for class 123 subclass 202][List of Patents for class 123 subclass 202]202 Subclass 202 indent level is 1 With means to control degree of compression
 [List of Pre Grant Publications for class 123 subclass 203][List of Patents for class 123 subclass 203]203 Subclass 203 indent level is 1 With combusted gas treatment or handling means
 [List of Pre Grant Publications for class 123 subclass 204][List of Patents for class 123 subclass 204]204 Subclass 204 indent level is 1 With compression volume means in uninterrupted communication with expansion volume means
[List of Pre Grant Publications for class 123 subclass 205][List of Patents for class 123 subclass 205]205 Subclass 205 indent level is 1 With fuel injection means
[List of Pre Grant Publications for class 123 subclass 210][List of Patents for class 123 subclass 210]210 Subclass 210 indent level is 1 With ignition means
[List of Pre Grant Publications for class 123 subclass 212][List of Patents for class 123 subclass 212]212 Subclass 212 indent level is 1 With plural compression volume means
[List of Pre Grant Publications for class 123 subclass 214][List of Patents for class 123 subclass 214]214 Subclass 214 indent level is 1 With plural expansion volume means
[List of Pre Grant Publications for class 123 subclass 216][List of Patents for class 123 subclass 216]216 Subclass 216 indent level is 1 With charge treatment means
[List of Pre Grant Publications for class 123 subclass 221][List of Patents for class 123 subclass 221]221 Subclass 221 indent level is 1 With transfer means intermediate single compression volume means and single expansion volume means
[List of Pre Grant Publications for class 123 subclass 241][List of Patents for class 123 subclass 241]241 Subclass 241 indent level is 1 With compression, combustion, and expansion in a single variable volume
[List of Pre Grant Publications for class 123 subclass 247][List of Patents for class 123 subclass 247]247 Subclass 247 indent level is 1 Only combustion and expansion of charge in engine
[List of Pre Grant Publications for class 123 subclass 18R][List of Patents for class 123 subclass 18R]  18R OSCILLATING PISTON
 [List of Pre Grant Publications for class 123 subclass 19][List of Patents for class 123 subclass 19]19 LIQUID PISTON
 [List of Pre Grant Publications for class 123 subclass 21][List of Patents for class 123 subclass 21]21 CONVERTIBLE CYCLE
 [List of Pre Grant Publications for class 123 subclass 22][List of Patents for class 123 subclass 22]22 INTERNAL COMBUSTION AND AIR
 [List of Pre Grant Publications for class 123 subclass 23][List of Patents for class 123 subclass 23]23 SOLID FUEL
[List of Pre Grant Publications for class 123 subclass 24R][List of Patents for class 123 subclass 24R]  24R GUNPOWDER
[List of Pre Grant Publications for class 123 subclass 25R][List of Patents for class 123 subclass 25R]  25R WATER AND HYDROCARBON
 [List of Pre Grant Publications for class 123 subclass 26][List of Patents for class 123 subclass 26]26 ADDITIONAL AIR SUPPLY
[List of Pre Grant Publications for class 123 subclass 250][List of Patents for class 123 subclass 250]250 ENGINE MEANS HAVING INTERNAL VAPORIZING IN PRECHAMBER WITH ALL COMBUSTION IN MAIN CHAMBER
[List of Pre Grant Publications for class 123 subclass 253][List of Patents for class 123 subclass 253]253 PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES
 [List of Pre Grant Publications for class 123 subclass 254][List of Patents for class 123 subclass 254]254 Subclass 254 indent level is 1 Chamber temperature control means
 [List of Pre Grant Publications for class 123 subclass 255][List of Patents for class 123 subclass 255]255 Subclass 255 indent level is 1 Vaporizing in precombustion chamber
 [List of Pre Grant Publications for class 123 subclass 256][List of Patents for class 123 subclass 256]256 Subclass 256 indent level is 1 Plural precombustion chambers
 [List of Pre Grant Publications for class 123 subclass 257][List of Patents for class 123 subclass 257]257 Subclass 257 indent level is 1 Two-cycle
 [List of Pre Grant Publications for class 123 subclass 258][List of Patents for class 123 subclass 258]258 Subclass 258 indent level is 1 Having timed valves to precombustion and main combustion chambers
 [List of Pre Grant Publications for class 123 subclass 259][List of Patents for class 123 subclass 259]259 Subclass 259 indent level is 1 Having volumetric relation between precombustion and main combustion chambers
 [List of Pre Grant Publications for class 123 subclass 260][List of Patents for class 123 subclass 260]260 Subclass 260 indent level is 1 With ignition means particularly positioned relative to precombustion and main combustion chambers
 [List of Pre Grant Publications for class 123 subclass 261][List of Patents for class 123 subclass 261]261 Subclass 261 indent level is 1 With injection means particularly positioned relative to precombustion and main combustion chambers
[List of Pre Grant Publications for class 123 subclass 262][List of Patents for class 123 subclass 262]262 Subclass 262 indent level is 1 Having fluid whirling means
 [List of Pre Grant Publications for class 123 subclass 264][List of Patents for class 123 subclass 264]264 Subclass 264 indent level is 1 Precombustion chamber is carried by a valve
 [List of Pre Grant Publications for class 123 subclass 265][List of Patents for class 123 subclass 265]265 Subclass 265 indent level is 1 Precombustion and main chambers form an "I" head
[List of Pre Grant Publications for class 123 subclass 266][List of Patents for class 123 subclass 266]266 Subclass 266 indent level is 1 Precombustion chamber assembly inserted in spark plug hole
 [List of Pre Grant Publications for class 123 subclass 268][List of Patents for class 123 subclass 268]268 Subclass 268 indent level is 1 Valveless precombustion chamber
 [List of Pre Grant Publications for class 123 subclass 269][List of Patents for class 123 subclass 269]269 Subclass 269 indent level is 1 Piston shape complements precombustion chamber discharge
[List of Pre Grant Publications for class 123 subclass 270][List of Patents for class 123 subclass 270]270 Subclass 270 indent level is 1 Precombustion chamber liner or coating
 [List of Pre Grant Publications for class 123 subclass 273][List of Patents for class 123 subclass 273]273 Subclass 273 indent level is 1 Precombustion chamber mounting means
[List of Pre Grant Publications for class 123 subclass 274][List of Patents for class 123 subclass 274]274 Subclass 274 indent level is 1 Having combustible mixture forming means
 [List of Pre Grant Publications for class 123 subclass 279][List of Patents for class 123 subclass 279]279 Subclass 279 indent level is 1 Piston carried precombustion chamber
 [List of Pre Grant Publications for class 123 subclass 280][List of Patents for class 123 subclass 280]280 Subclass 280 indent level is 1 Atomizer, deflector, or shield in precombustion chamber
[List of Pre Grant Publications for class 123 subclass 281][List of Patents for class 123 subclass 281]281 Subclass 281 indent level is 1 Precombustion chamber shape is a figure of revolution
 [List of Pre Grant Publications for class 123 subclass 285][List of Patents for class 123 subclass 285]285 Subclass 285 indent level is 1 Precombustion chamber having a specific shape
[List of Pre Grant Publications for class 123 subclass 286][List of Patents for class 123 subclass 286]286 Subclass 286 indent level is 1 Having specific connecting passage means between precombustion and main combustion chambers
[List of Pre Grant Publications for class 123 subclass 294][List of Patents for class 123 subclass 294]294 COMBUSTION CHAMBER MEANS HAVING FUEL INJECTION ONLY
[List of Pre Grant Publications for class 123 subclass 27R][List of Patents for class 123 subclass 27R]  27R BURNING BY HIGHLY COMPRESSED AIR
     OIL ENGINES
                 Subclass indent level is 1 Pump supply to air inlet
 [List of Pre Grant Publications for class 123 subclass 37][List of Patents for class 123 subclass 37]37 MULTIPLE EXPLOSION
 [List of Pre Grant Publications for class 123 subclass 38][List of Patents for class 123 subclass 38]38 ATMOSPHERIC
 [List of Pre Grant Publications for class 123 subclass 39][List of Patents for class 123 subclass 39]39 NONCOMPRESSION
[List of Pre Grant Publications for class 123 subclass 41R][List of Patents for class 123 subclass 41R]  41R REVERSIBLE
[List of Pre Grant Publications for class 123 subclass 41.01][List of Patents for class 123 subclass 41.01]41.01 COOLING
[List of Pre Grant Publications for class 123 subclass 41.02][List of Patents for class 123 subclass 41.02]41.02 Subclass 41.02 indent level is 1 Automatic coolant flow control
 [List of Pre Grant Publications for class 123 subclass 41.13][List of Patents for class 123 subclass 41.13]41.13 Subclass 41.13 indent level is 1 Interrelated coolant flow and throttle control
 [List of Pre Grant Publications for class 123 subclass 41.14][List of Patents for class 123 subclass 41.14]41.14 Subclass 41.14 indent level is 1 System drained and/or heat-storing
 [List of Pre Grant Publications for class 123 subclass 41.15][List of Patents for class 123 subclass 41.15]41.15 Subclass 41.15 indent level is 1 Indicators and safety devices
 [List of Pre Grant Publications for class 123 subclass 41.16][List of Patents for class 123 subclass 41.16]41.16 Subclass 41.16 indent level is 1 Coolant sealed in cylinder valve or piston
 [List of Pre Grant Publications for class 123 subclass 41.17][List of Patents for class 123 subclass 41.17]41.17 Subclass 41.17 indent level is 1 Coolant released into cylinder or valve passages
 [List of Pre Grant Publications for class 123 subclass 41.18][List of Patents for class 123 subclass 41.18]41.18 Subclass 41.18 indent level is 1 Convertible
 [List of Pre Grant Publications for class 123 subclass 41.19][List of Patents for class 123 subclass 41.19]41.19 Subclass 41.19 indent level is 1 Refrigerating cycle
[List of Pre Grant Publications for class 123 subclass 41.2][List of Patents for class 123 subclass 41.2]41.2 Subclass 41.2 indent level is 1 With vapor generation and/or condensing
 [List of Pre Grant Publications for class 123 subclass 41.28][List of Patents for class 123 subclass 41.28]41.28 Subclass 41.28 indent level is 1 Multiple cylinders with equalized cooling
 [List of Pre Grant Publications for class 123 subclass 41.29][List of Patents for class 123 subclass 41.29]41.29 Subclass 41.29 indent level is 1 Parallel flow
 [List of Pre Grant Publications for class 123 subclass 41.3][List of Patents for class 123 subclass 41.3]41.3 Subclass 41.3 indent level is 1 Mixed air and liquid
[List of Pre Grant Publications for class 123 subclass 41.31][List of Patents for class 123 subclass 41.31]41.31 Subclass 41.31 indent level is 1 With cooling of additional parts or materials
[List of Pre Grant Publications for class 123 subclass 41.34][List of Patents for class 123 subclass 41.34]41.34 Subclass 41.34 indent level is 1 Internal cooling of moving parts; e.g., hollow valves, pistons, and movable cylinder
 [List of Pre Grant Publications for class 123 subclass 41.42][List of Patents for class 123 subclass 41.42]41.42 Subclass 41.42 indent level is 1 Liquid coolants other than water and water treatment
 [List of Pre Grant Publications for class 123 subclass 41.43][List of Patents for class 123 subclass 41.43]41.43 Subclass 41.43 indent level is 1 Movably mounted tank or radiator
[List of Pre Grant Publications for class 123 subclass 41.44][List of Patents for class 123 subclass 41.44]41.44 Subclass 41.44 indent level is 1 With liquid coolant circulating means
[List of Pre Grant Publications for class 123 subclass 41.48][List of Patents for class 123 subclass 41.48]41.48 Subclass 41.48 indent level is 1 Devices for cooling liquid by air flow
 [List of Pre Grant Publications for class 123 subclass 41.5][List of Patents for class 123 subclass 41.5]41.5 Subclass 41.5 indent level is 1 Yielding or resilient walls
 [List of Pre Grant Publications for class 123 subclass 41.51][List of Patents for class 123 subclass 41.51]41.51 Subclass 41.51 indent level is 1 Plural radiators and/or tanks in series
[List of Pre Grant Publications for class 123 subclass 41.52][List of Patents for class 123 subclass 41.52]41.52 Subclass 41.52 indent level is 1 Engine or cylinder-mounted heat dissipators
 [List of Pre Grant Publications for class 123 subclass 41.54][List of Patents for class 123 subclass 41.54]41.54 Subclass 41.54 indent level is 1 With vent
 [List of Pre Grant Publications for class 123 subclass 41.55][List of Patents for class 123 subclass 41.55]41.55 Subclass 41.55 indent level is 1 Combined
[List of Pre Grant Publications for class 123 subclass 41.56][List of Patents for class 123 subclass 41.56]41.56 Subclass 41.56 indent level is 1 Air-cooled
 [List of Pre Grant Publications for class 123 subclass 41.71][List of Patents for class 123 subclass 41.71]41.71 Subclass 41.71 indent level is 1 Plural materials
[List of Pre Grant Publications for class 123 subclass 41.72][List of Patents for class 123 subclass 41.72]41.72 Subclass 41.72 indent level is 1 With jacketed head and/or cylinder
 [List of Pre Grant Publications for class 123 subclass 41.85][List of Patents for class 123 subclass 41.85]41.85 Subclass 41.85 indent level is 1 Valve seats or guides
 [List of Pre Grant Publications for class 123 subclass 41.86][List of Patents for class 123 subclass 41.86]41.86 CRANKCASE VENTILATION
 [List of Pre Grant Publications for class 123 subclass 42][List of Patents for class 123 subclass 42]42 OSCILLATING CYLINDER
[List of Pre Grant Publications for class 123 subclass 43R][List of Patents for class 123 subclass 43R]  43R ROTATING CYLINDER
[List of Pre Grant Publications for class 123 subclass 45R][List of Patents for class 123 subclass 45R]  45R ROTARY RECIPROCATING PISTON
[List of Pre Grant Publications for class 123 subclass 46R][List of Patents for class 123 subclass 46R]  46R FREE PISTON
[List of Pre Grant Publications for class 123 subclass 47R][List of Patents for class 123 subclass 47R]  47R VALVED PISTON
[List of Pre Grant Publications for class 123 subclass 48R][List of Patents for class 123 subclass 48R]  48R ADJUSTABLE COMBUSTION CHAMBER
[List of Pre Grant Publications for class 123 subclass 50R][List of Patents for class 123 subclass 50R]  50R RECIPROCATING CYLINDER
[List of Pre Grant Publications for class 123 subclass 51R][List of Patents for class 123 subclass 51R]  51R MULTIPLE PISTON, COMMON NONRESTRICTIVE COMBUSTION CHAMBER
[List of Pre Grant Publications for class 123 subclass 52.1][List of Patents for class 123 subclass 52.1]52.1 MULTIPLE CYLINDER
[List of Pre Grant Publications for class 123 subclass 52.2][List of Patents for class 123 subclass 52.2]52.2 Subclass 52.2 indent level is 1 Simultaneous compression, distinct pistons, restricted communication to a single combustion chamber
[List of Pre Grant Publications for class 123 subclass 53.1][List of Patents for class 123 subclass 53.1]53.1 Subclass 53.1 indent level is 1 Cylinder offset from crankshaft axis
 [List of Pre Grant Publications for class 123 subclass 53.6][List of Patents for class 123 subclass 53.6]53.6 Subclass 53.6 indent level is 1 Cylinders having opposing heads
[List of Pre Grant Publications for class 123 subclass 54.1][List of Patents for class 123 subclass 54.1]54.1 Subclass 54.1 indent level is 1 Cylinders radiating
[List of Pre Grant Publications for class 123 subclass 56.1][List of Patents for class 123 subclass 56.1]56.1 Subclass 56.1 indent level is 1 Having rotary output shaft parallel to cylinders
[List of Pre Grant Publications for class 123 subclass 58.1][List of Patents for class 123 subclass 58.1]58.1 Subclass 58.1 indent level is 1 Cylinders in-line
 [List of Pre Grant Publications for class 123 subclass 60.1][List of Patents for class 123 subclass 60.1]60.1 Subclass 60.1 indent level is 1 Locked annular piston
     DOUBLE-ACTING
 [List of Pre Grant Publications for class 123 subclass 64][List of Patents for class 123 subclass 64]64 SIX-CYCLE
[List of Pre Grant Publications for class 123 subclass 65R][List of Patents for class 123 subclass 65R]  65R TWO-CYCLE
 [List of Pre Grant Publications for class 123 subclass 66][List of Patents for class 123 subclass 66]66 Subclass 66 indent level is 1 Combined pump and motor cylinder
 [List of Pre Grant Publications for class 123 subclass 67][List of Patents for class 123 subclass 67]67 Subclass 67 indent level is 1 Divided pump discharge
 [List of Pre Grant Publications for class 123 subclass 68][List of Patents for class 123 subclass 68]68 Subclass 68 indent level is 1 Pump compression
[List of Pre Grant Publications for class 123 subclass 69R][List of Patents for class 123 subclass 69R]  69R Subclass 69R indent level is 1 Separate air and gas pumps
[List of Pre Grant Publications for class 123 subclass 70R][List of Patents for class 123 subclass 70R]  70R Subclass 70R indent level is 1 Pump and cylinder adjacent
[List of Pre Grant Publications for class 123 subclass 71R][List of Patents for class 123 subclass 71R]  71R Subclass 71R indent level is 1 Pump and cylinder coaxial
 [List of Pre Grant Publications for class 123 subclass 72][List of Patents for class 123 subclass 72]72 Subclass 72 indent level is 1 Pump and cylinder inclined
     Subclass indent level is 1 Rear compression
 [List of Pre Grant Publications for class 123 subclass 65PE][List of Patents for class 123 subclass 65PE]65PE Subclass 65PE indent level is 1 Exhaust ports
 [List of Pre Grant Publications for class 123 subclass 65A][List of Patents for class 123 subclass 65A]65A Subclass 65A indent level is 1 Inlet and exhaust ports in two or more planes
 [List of Pre Grant Publications for class 123 subclass 65B][List of Patents for class 123 subclass 65B]65B Subclass 65B indent level is 1 Pumps
 [List of Pre Grant Publications for class 123 subclass 65BA][List of Patents for class 123 subclass 65BA]65BA Subclass 65BA indent level is 1 Blowers
 [List of Pre Grant Publications for class 123 subclass 65PD][List of Patents for class 123 subclass 65PD]65PD Subclass 65PD indent level is 1 Port deflectors
 [List of Pre Grant Publications for class 123 subclass 65E][List of Patents for class 123 subclass 65E]65E Subclass 65E indent level is 1 Scavenging by inertia of exhaust gas and charging by use of pressure waves
 [List of Pre Grant Publications for class 123 subclass 65S][List of Patents for class 123 subclass 65S]65S Subclass 65S indent level is 1 Step piston (see sub. 59 BS)
[List of Pre Grant Publications for class 123 subclass 65V][List of Patents for class 123 subclass 65V]65V Subclass 65V indent level is 1 Valves
 [List of Pre Grant Publications for class 123 subclass 65VB][List of Patents for class 123 subclass 65VB]65VB Subclass 65VB indent level is 1 Lengthwise scavenging list above
 [List of Pre Grant Publications for class 123 subclass 65VC][List of Patents for class 123 subclass 65VC]65VC Subclass 65VC indent level is 1 Lengthwise scavenging exhaust above
 [List of Pre Grant Publications for class 123 subclass 65VD][List of Patents for class 123 subclass 65VD]65VD Subclass 65VD indent level is 1 Intake and exhaust valve in top of cylinder
[List of Pre Grant Publications for class 123 subclass 65W][List of Patents for class 123 subclass 65W]65W Subclass 65W indent level is 1 Whirl through piston-controlled ports
 [List of Pre Grant Publications for class 123 subclass 65WV][List of Patents for class 123 subclass 65WV]65WV Subclass 65WV indent level is 1 Vacuum intake
 [List of Pre Grant Publications for class 123 subclass 65SP][List of Patents for class 123 subclass 65SP]65SP Subclass 65SP indent level is 1 Single port for inlet and exhaust
 [List of Pre Grant Publications for class 123 subclass 65EM][List of Patents for class 123 subclass 65EM]65EM Subclass 65EM indent level is 1 Exhaust manifolds
 [List of Pre Grant Publications for class 123 subclass 65P][List of Patents for class 123 subclass 65P]65P Subclass 65P indent level is 1 Ports
[List of Pre Grant Publications for class 123 subclass 306][List of Patents for class 123 subclass 306]306 MEANS TO WHIRL FLUID BEFORE, UPON, OR AFTER ENTRY INTO COMBUSTION CHAMBER
 [List of Pre Grant Publications for class 123 subclass 310][List of Patents for class 123 subclass 310]310 COMBUSTION CHAMBER HAVING MULTIPLE SPARK GAPS
[List of Pre Grant Publications for class 123 subclass 311][List of Patents for class 123 subclass 311]311 FOUR-CYCLE
[List of Pre Grant Publications for class 123 subclass 319][List of Patents for class 123 subclass 319]319 ENGINE SPEED REGULATOR
[List of Pre Grant Publications for class 123 subclass 320][List of Patents for class 123 subclass 320]320 Subclass 320 indent level is 1 Responsive to deceleration mode (e.g., engine acting as a brake)
[List of Pre Grant Publications for class 123 subclass 330][List of Patents for class 123 subclass 330]330 Subclass 330 indent level is 1 Engine speed reduction by overriching the combustible mixture (e.g., choking engine)
[List of Pre Grant Publications for class 123 subclass 332][List of Patents for class 123 subclass 332]332 Subclass 332 indent level is 1 Engine speed reduction by fuel cutoff
[List of Pre Grant Publications for class 123 subclass 334][List of Patents for class 123 subclass 334]334 Subclass 334 indent level is 1 Engine speed reduction by partial or complete omission of the ignition
 [List of Pre Grant Publications for class 123 subclass 336][List of Patents for class 123 subclass 336]336 Subclass 336 indent level is 1 Having plural throttle valve structure
 [List of Pre Grant Publications for class 123 subclass 337][List of Patents for class 123 subclass 337]337 Subclass 337 indent level is 1 Specific throttle valve structure
 [List of Pre Grant Publications for class 123 subclass 338][List of Patents for class 123 subclass 338]338 Subclass 338 indent level is 1 Fuel injection pump bypass control
[List of Pre Grant Publications for class 123 subclass 339.1][List of Patents for class 123 subclass 339.1]339.1 Subclass 339.1 indent level is 1 Idle speed control
 [List of Pre Grant Publications for class 123 subclass 342][List of Patents for class 123 subclass 342]342 Subclass 342 indent level is 1 Regulator changes length of accelerator linkage
 [List of Pre Grant Publications for class 123 subclass 343][List of Patents for class 123 subclass 343]343 Subclass 343 indent level is 1 Regulator accessory (e.g., cleaner, adjusting tool, etc.)
 [List of Pre Grant Publications for class 123 subclass 344][List of Patents for class 123 subclass 344]344 Subclass 344 indent level is 1 Charge proportion varying (e.g., the fuel-air ratio is varied)
[List of Pre Grant Publications for class 123 subclass 345][List of Patents for class 123 subclass 345]345 Subclass 345 indent level is 1 By changing valve lift
[List of Pre Grant Publications for class 123 subclass 347][List of Patents for class 123 subclass 347]347 Subclass 347 indent level is 1 By changing valve timing
[List of Pre Grant Publications for class 123 subclass 349][List of Patents for class 123 subclass 349]349 Subclass 349 indent level is 1 Having condition responsive means with engine being part of a closed feedback system (e.g., cruise control)
[List of Pre Grant Publications for class 123 subclass 350][List of Patents for class 123 subclass 350]350 Subclass 350 indent level is 2 Electrical sensing or regulating
[List of Pre Grant Publications for class 123 subclass 363][List of Patents for class 123 subclass 363]363 Subclass 363 indent level is 2 Mechanical sensor or regulator
[List of Pre Grant Publications for class 123 subclass 378][List of Patents for class 123 subclass 378]378 Subclass 378 indent level is 2 Fluidic sensor or regulator
 [List of Pre Grant Publications for class 123 subclass 394][List of Patents for class 123 subclass 394]394 Subclass 394 indent level is 2 By combustion air or air-fuel mixture cutoff
[List of Pre Grant Publications for class 123 subclass 395][List of Patents for class 123 subclass 395]395 Subclass 395 indent level is 1 Open loop condition responsive
[List of Pre Grant Publications for class 123 subclass 402][List of Patents for class 123 subclass 402]402 Subclass 402 indent level is 1 Charge volume varying (e.g., total amount of mixture fed to engine is varied; relative amounts of air and fuel are fixed)
[List of Pre Grant Publications for class 123 subclass 406.11][List of Patents for class 123 subclass 406.11]406.11 SPARK IGNITION TIMING CONTROL
[List of Pre Grant Publications for class 123 subclass 406.12][List of Patents for class 123 subclass 406.12]406.12 Subclass 406.12 indent level is 1 Electronic control
[List of Pre Grant Publications for class 123 subclass 406.13][List of Patents for class 123 subclass 406.13]406.13 Subclass 406.13 indent level is 2 With fail-safe, backup or malfunction detecting means
[List of Pre Grant Publications for class 123 subclass 406.19][List of Patents for class 123 subclass 406.19]406.19 Subclass 406.19 indent level is 2 Closed loop feedback control of spark timing
[List of Pre Grant Publications for class 123 subclass 406.45][List of Patents for class 123 subclass 406.45]406.45 Subclass 406.45 indent level is 2 Including control of combustible mixture or a constituent thereof (e.g., air, fuel, exhaust gas)
 [List of Pre Grant Publications for class 123 subclass 406.49][List of Patents for class 123 subclass 406.49]406.49 Subclass 406.49 indent level is 2 Barometric pressure responsive
[List of Pre Grant Publications for class 123 subclass 406.5][List of Patents for class 123 subclass 406.5]406.5 Subclass 406.5 indent level is 2 Acceleration or deceleration responsive
 [List of Pre Grant Publications for class 123 subclass 406.52][List of Patents for class 123 subclass 406.52]406.52 Subclass 406.52 indent level is 2 Throttle position responsive
[List of Pre Grant Publications for class 123 subclass 406.53][List of Patents for class 123 subclass 406.53]406.53 Subclass 406.53 indent level is 2 Starting condition responsive
 [List of Pre Grant Publications for class 123 subclass 406.55][List of Patents for class 123 subclass 406.55]406.55 Subclass 406.55 indent level is 2 Temperature responsive (e.g., ambient, engine, etc.)
[List of Pre Grant Publications for class 123 subclass 406.56][List of Patents for class 123 subclass 406.56]406.56 Subclass 406.56 indent level is 2 With magneto
[List of Pre Grant Publications for class 123 subclass 406.58][List of Patents for class 123 subclass 406.58]406.58 Subclass 406.58 indent level is 2 Having engine shaft rotational position signal generator (e.g., crank shaft, cam shaft)
[List of Pre Grant Publications for class 123 subclass 406.67][List of Patents for class 123 subclass 406.67]406.67 Subclass 406.67 indent level is 1 Vacuum timing control
 [List of Pre Grant Publications for class 123 subclass 406.74][List of Patents for class 123 subclass 406.74]406.74 Subclass 406.74 indent level is 1 Mechanical or hydraulic link to throttle valve or accelerator
 [List of Pre Grant Publications for class 123 subclass 406.75][List of Patents for class 123 subclass 406.75]406.75 Subclass 406.75 indent level is 1 Centrifugal timing mechanism
 [List of Pre Grant Publications for class 123 subclass 406.76][List of Patents for class 123 subclass 406.76]406.76 Subclass 406.76 indent level is 1 Spark delay actuated or deactuated by starting device
[List of Pre Grant Publications for class 123 subclass 429][List of Patents for class 123 subclass 429]429 COMBUSTION CHAMBER MEANS COMBINED WITH AIR-FUEL MIXTURE FORMING MEANS
[List of Pre Grant Publications for class 123 subclass 434][List of Patents for class 123 subclass 434]434 CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL)
 [List of Pre Grant Publications for class 123 subclass 435][List of Patents for class 123 subclass 435]435 Subclass 435 indent level is 1 Including cylinder pressure or temperature responsive means
 [List of Pre Grant Publications for class 123 subclass 436][List of Patents for class 123 subclass 436]436 Subclass 436 indent level is 1 Including means responsive to instantaneous change in engine speed
[List of Pre Grant Publications for class 123 subclass 672][List of Patents for class 123 subclass 672]672 Subclass 672 indent level is 1 Including exhaust gas condition responsive means
 [List of Pre Grant Publications for class 123 subclass 704][List of Patents for class 123 subclass 704]704 Subclass 704 indent level is 1 Air/fuel ratio prior to combustion responsive means
[List of Pre Grant Publications for class 123 subclass 437][List of Patents for class 123 subclass 437]437 Subclass 437 indent level is 1 Auxiliary control of carburetor fuel metering
 [List of Pre Grant Publications for class 123 subclass 442][List of Patents for class 123 subclass 442]442 Subclass 442 indent level is 1 Injection or carburetion system having a series of throttle valves
 [List of Pre Grant Publications for class 123 subclass 443][List of Patents for class 123 subclass 443]443 Subclass 443 indent level is 1 Alternate or simultaneous lean-rich
 [List of Pre Grant Publications for class 123 subclass 444][List of Patents for class 123 subclass 444]444 Subclass 444 indent level is 1 Having fluidic logic control means
[List of Pre Grant Publications for class 123 subclass 445][List of Patents for class 123 subclass 445]445 Subclass 445 indent level is 1 Fuel injection system
[List of Pre Grant Publications for class 123 subclass 446][List of Patents for class 123 subclass 446]446 Subclass 446 indent level is 2 Fuel pump flow regulation
 [List of Pre Grant Publications for class 123 subclass 467][List of Patents for class 123 subclass 467]467 Subclass 467 indent level is 2 Drip prevention means at injector nozzle
[List of Pre Grant Publications for class 123 subclass 468][List of Patents for class 123 subclass 468]468 Subclass 468 indent level is 2 Having a specific shape, material, or location of fuel line
[List of Pre Grant Publications for class 123 subclass 470][List of Patents for class 123 subclass 470]470 Subclass 470 indent level is 2 Injection nozzle mounting means
[List of Pre Grant Publications for class 123 subclass 472][List of Patents for class 123 subclass 472]472 Subclass 472 indent level is 2 Electrically actuated injector
[List of Pre Grant Publications for class 123 subclass 495][List of Patents for class 123 subclass 495]495 Subclass 495 indent level is 1 With fuel pump
[List of Pre Grant Publications for class 123 subclass 510][List of Patents for class 123 subclass 510]510 Subclass 510 indent level is 1 Fuel flow regulation between the pump and the charge-forming device
[List of Pre Grant Publications for class 123 subclass 518][List of Patents for class 123 subclass 518]518 Subclass 518 indent level is 1 Having fuel vapor recovery and storage system
 [List of Pre Grant Publications for class 123 subclass 522][List of Patents for class 123 subclass 522]522 Subclass 522 indent level is 1 Liquid fuel evaporating by submerged air supply
[List of Pre Grant Publications for class 123 subclass 523][List of Patents for class 123 subclass 523]523 Subclass 523 indent level is 1 Liquid fuel evaporating by extended fuel film
[List of Pre Grant Publications for class 123 subclass 525][List of Patents for class 123 subclass 525]525 Subclass 525 indent level is 1 Combined liquid and gaseous fuel
[List of Pre Grant Publications for class 123 subclass 527][List of Patents for class 123 subclass 527]527 Subclass 527 indent level is 1 Gaseous fuel and air mixer
 [List of Pre Grant Publications for class 123 subclass 530][List of Patents for class 123 subclass 530]530 Subclass 530 indent level is 1 Constant flow fuel supply
[List of Pre Grant Publications for class 123 subclass 531][List of Patents for class 123 subclass 531]531 Subclass 531 indent level is 1 Auxiliary air or gas used to inject fuel
[List of Pre Grant Publications for class 123 subclass 536][List of Patents for class 123 subclass 536]536 Subclass 536 indent level is 1 Combustible mixture ionization, ozonation, or electrolysis
[List of Pre Grant Publications for class 123 subclass 540][List of Patents for class 123 subclass 540]540 Subclass 540 indent level is 1 Cooling of combustible mixture
[List of Pre Grant Publications for class 123 subclass 543][List of Patents for class 123 subclass 543]543 Subclass 543 indent level is 1 Heating of combustible mixture
[List of Pre Grant Publications for class 123 subclass 559.1][List of Patents for class 123 subclass 559.1]559.1 Subclass 559.1 indent level is 1 Supercharger
 [List of Pre Grant Publications for class 123 subclass 567][List of Patents for class 123 subclass 567]567 Subclass 567 indent level is 1 Oxidant is solely oxygen
[List of Pre Grant Publications for class 123 subclass 568.11][List of Patents for class 123 subclass 568.11]568.11 Subclass 568.11 indent level is 1 Exhaust gas used with the combustible mixture (e.g., emission control Exhaust Gas Recirculation (EGR) valve)
[List of Pre Grant Publications for class 123 subclass 572][List of Patents for class 123 subclass 572]572 Subclass 572 indent level is 1 Crankcase vapor used with combustible mixture
[List of Pre Grant Publications for class 123 subclass 575][List of Patents for class 123 subclass 575]575 Subclass 575 indent level is 1 Diverse fuel supply
[List of Pre Grant Publications for class 123 subclass 579][List of Patents for class 123 subclass 579]579 Subclass 579 indent level is 1 Multiple carburetors
[List of Pre Grant Publications for class 123 subclass 585][List of Patents for class 123 subclass 585]585 Subclass 585 indent level is 1 Auxiliary air or oxygen added to combustible mixture
[List of Pre Grant Publications for class 123 subclass 590][List of Patents for class 123 subclass 590]590 Subclass 590 indent level is 1 Charge-mixing device in intake (e.g., device which insures the atomization of the combustible mixture)
[List of Pre Grant Publications for class 123 subclass 594][List of Patents for class 123 subclass 594]594 HIGH TENSION IGNITION SYSTEM
 [List of Pre Grant Publications for class 123 subclass 595][List of Patents for class 123 subclass 595]595 Subclass 595 indent level is 1 Retrofit conversion ignition unit
[List of Pre Grant Publications for class 123 subclass 596][List of Patents for class 123 subclass 596]596 Subclass 596 indent level is 1 Using capacitive storage and discharge for spark energy
[List of Pre Grant Publications for class 123 subclass 606][List of Patents for class 123 subclass 606]606 Subclass 606 indent level is 1 High frequency ignition system
[List of Pre Grant Publications for class 123 subclass 609][List of Patents for class 123 subclass 609]609 Subclass 609 indent level is 1 Having dwell control
[List of Pre Grant Publications for class 123 subclass 612][List of Patents for class 123 subclass 612]612 Subclass 612 indent level is 1 Having engine component position sensor
[List of Pre Grant Publications for class 123 subclass 618][List of Patents for class 123 subclass 618]618 Subclass 618 indent level is 1 Having specific trigger circuitry
 [List of Pre Grant Publications for class 123 subclass 620][List of Patents for class 123 subclass 620]620 Subclass 620 indent level is 1 Additional spark energy supply
[List of Pre Grant Publications for class 123 subclass 621][List of Patents for class 123 subclass 621]621 Subclass 621 indent level is 1 Having an ignition coil with multiple primary or secondary windings
 [List of Pre Grant Publications for class 123 subclass 623][List of Patents for class 123 subclass 623]623 Subclass 623 indent level is 1 Having supply voltage regulation
 [List of Pre Grant Publications for class 123 subclass 624][List of Patents for class 123 subclass 624]624 Subclass 624 indent level is 1 Having ballast resistor cutout or control
[List of Pre Grant Publications for class 123 subclass 625][List of Patents for class 123 subclass 625]625 Subclass 625 indent level is 1 Responsive to engine or environmental condition
 [List of Pre Grant Publications for class 123 subclass 627][List of Patents for class 123 subclass 627]627 Subclass 627 indent level is 1 Having auxiliary spark gap in series or parallel with the coil
 [List of Pre Grant Publications for class 123 subclass 628][List of Patents for class 123 subclass 628]628 Subclass 628 indent level is 1 Having a continuous high voltage output to the high voltage distributor
 [List of Pre Grant Publications for class 123 subclass 629][List of Patents for class 123 subclass 629]629 Subclass 629 indent level is 1 Monostable multivibrator controls timing of coil primary current
[List of Pre Grant Publications for class 123 subclass 630][List of Patents for class 123 subclass 630]630 Subclass 630 indent level is 1 Safety device
 [List of Pre Grant Publications for class 123 subclass 633][List of Patents for class 123 subclass 633]633 Subclass 633 indent level is 1 Radio interference protection
 [List of Pre Grant Publications for class 123 subclass 634][List of Patents for class 123 subclass 634]634 Subclass 634 indent level is 1 Having a specific ignition coil
 [List of Pre Grant Publications for class 123 subclass 635][List of Patents for class 123 subclass 635]635 Subclass 635 indent level is 1 Specific coil location
[List of Pre Grant Publications for class 123 subclass 636][List of Patents for class 123 subclass 636]636 Subclass 636 indent level is 1 Multiple spark ignition system
[List of Pre Grant Publications for class 123 subclass 640][List of Patents for class 123 subclass 640]640 Subclass 640 indent level is 1 Dual systems
 [List of Pre Grant Publications for class 123 subclass 642][List of Patents for class 123 subclass 642]642 Subclass 642 indent level is 1 Piezoelectric voltage generator
 [List of Pre Grant Publications for class 123 subclass 643][List of Patents for class 123 subclass 643]643 Subclass 643 indent level is 1 Electronic cylinder sequencing
 [List of Pre Grant Publications for class 123 subclass 644][List of Patents for class 123 subclass 644]644 Subclass 644 indent level is 1 Current or voltage sensing in coil primary
[List of Pre Grant Publications for class 123 subclass 645][List of Patents for class 123 subclass 645]645 Subclass 645 indent level is 1 Maverick spark suppressor
 [List of Pre Grant Publications for class 123 subclass 647][List of Patents for class 123 subclass 647]647 Subclass 647 indent level is 1 Having a specific mounting of system component
 [List of Pre Grant Publications for class 123 subclass 648][List of Patents for class 123 subclass 648]648 Subclass 648 indent level is 1 Having SCR triggered by lowering cathode voltage below ground
 [List of Pre Grant Publications for class 123 subclass 649][List of Patents for class 123 subclass 649]649 Subclass 649 indent level is 1 Multiple primary current interrupters
[List of Pre Grant Publications for class 123 subclass 650][List of Patents for class 123 subclass 650]650 Subclass 650 indent level is 1 Power supply, ignition coil primary, and interrupter element all in series
[List of Pre Grant Publications for class 123 subclass 90.1][List of Patents for class 123 subclass 90.1]90.1 POPPET VALVE OPERATING MECHANISM
 [List of Pre Grant Publications for class 123 subclass 90.11][List of Patents for class 123 subclass 90.11]90.11 Subclass 90.11 indent level is 1 Electrical system
[List of Pre Grant Publications for class 123 subclass 90.12][List of Patents for class 123 subclass 90.12]90.12 Subclass 90.12 indent level is 1 Hydraulic system
 [List of Pre Grant Publications for class 123 subclass 90.14][List of Patents for class 123 subclass 90.14]90.14 Subclass 90.14 indent level is 1 Pneumatic system
[List of Pre Grant Publications for class 123 subclass 90.15][List of Patents for class 123 subclass 90.15]90.15 Subclass 90.15 indent level is 1 With means for varying timing
 [List of Pre Grant Publications for class 123 subclass 90.19][List of Patents for class 123 subclass 90.19]90.19 Subclass 90.19 indent level is 1 With temperature compensation
 [List of Pre Grant Publications for class 123 subclass 90.2][List of Patents for class 123 subclass 90.2]90.2 Subclass 90.2 indent level is 1 With compound movement of cam follower
 [List of Pre Grant Publications for class 123 subclass 90.21][List of Patents for class 123 subclass 90.21]90.21 Subclass 90.21 indent level is 1 Follower displaced axially of camshaft
[List of Pre Grant Publications for class 123 subclass 90.22][List of Patents for class 123 subclass 90.22]90.22 Subclass 90.22 indent level is 1 Plural valve trains, single actuator
[List of Pre Grant Publications for class 123 subclass 90.24][List of Patents for class 123 subclass 90.24]90.24 Subclass 90.24 indent level is 1 Valve driven closed
 [List of Pre Grant Publications for class 123 subclass 90.27][List of Patents for class 123 subclass 90.27]90.27 Subclass 90.27 indent level is 1 Overhead camshaft
[List of Pre Grant Publications for class 123 subclass 90.28][List of Patents for class 123 subclass 90.28]90.28 Subclass 90.28 indent level is 1 With nonvalving movement (e.g., about valve stem)
 [List of Pre Grant Publications for class 123 subclass 90.31][List of Patents for class 123 subclass 90.31]90.31 Subclass 90.31 indent level is 1 Camshaft drive means
 [List of Pre Grant Publications for class 123 subclass 90.32][List of Patents for class 123 subclass 90.32]90.32 Subclass 90.32 indent level is 1 With alternate interruption of drive train
[List of Pre Grant Publications for class 123 subclass 90.33][List of Patents for class 123 subclass 90.33]90.33 Subclass 90.33 indent level is 1 Lubrication
[List of Pre Grant Publications for class 123 subclass 90.39][List of Patents for class 123 subclass 90.39]90.39 Subclass 90.39 indent level is 1 Rocker
[List of Pre Grant Publications for class 123 subclass 90.48][List of Patents for class 123 subclass 90.48]90.48 Subclass 90.48 indent level is 1 Tappet
 [List of Pre Grant Publications for class 123 subclass 90.6][List of Patents for class 123 subclass 90.6]90.6 Subclass 90.6 indent level is 1 Cam
[List of Pre Grant Publications for class 123 subclass 90.61][List of Patents for class 123 subclass 90.61]90.61 Subclass 90.61 indent level is 1 Rod
[List of Pre Grant Publications for class 123 subclass 90.65][List of Patents for class 123 subclass 90.65]90.65 Subclass 90.65 indent level is 1 Spring
[List of Pre Grant Publications for class 123 subclass 143R][List of Patents for class 123 subclass 143R]  143R IGNITERS
 [List of Pre Grant Publications for class 123 subclass 144][List of Patents for class 123 subclass 144]144 Subclass 144 indent level is 1 Flame
[List of Pre Grant Publications for class 123 subclass 145R][List of Patents for class 123 subclass 145R]  145R Subclass 145R indent level is 1 Incandescent
[List of Pre Grant Publications for class 123 subclass 146.5R][List of Patents for class 123 subclass 146.5R]  146.5R Subclass 146.5R indent level is 1 Sparkers
 [List of Pre Grant Publications for class 123 subclass 143A][List of Patents for class 123 subclass 143A]143A Subclass 143A indent level is 1 High compression igniters
 [List of Pre Grant Publications for class 123 subclass 143B][List of Patents for class 123 subclass 143B]143B Subclass 143B indent level is 1 Special charge igniters
 [List of Pre Grant Publications for class 123 subclass 143C][List of Patents for class 123 subclass 143C]143C Subclass 143C indent level is 1 Insulated casing enclosing wires leading to plugs, distributor, etc.
[List of Pre Grant Publications for class 123 subclass 192.1][List of Patents for class 123 subclass 192.1]192.1 VIBRATION COMPENSATING DEVICE
[List of Pre Grant Publications for class 123 subclass 197.1][List of Patents for class 123 subclass 197.1]197.1 TRANSMISSION MECHANISM FROM PISTON
[List of Pre Grant Publications for class 123 subclass 179.1][List of Patents for class 123 subclass 179.1]179.1 STARTING DEVICE
 [List of Pre Grant Publications for class 123 subclass 179.2][List of Patents for class 123 subclass 179.2]179.2 Subclass 179.2 indent level is 1 Remote control
[List of Pre Grant Publications for class 123 subclass 179.3][List of Patents for class 123 subclass 179.3]179.3 Subclass 179.3 indent level is 1 Condition responsive control of starting device
 [List of Pre Grant Publications for class 123 subclass 179.5][List of Patents for class 123 subclass 179.5]179.5 Subclass 179.5 indent level is 1 Control of spark ignition during starting
 [List of Pre Grant Publications for class 123 subclass 179.6][List of Patents for class 123 subclass 179.6]179.6 Subclass 179.6 indent level is 1 Control of glow plug during starting
[List of Pre Grant Publications for class 123 subclass 179.7][List of Patents for class 123 subclass 179.7]179.7 Subclass 179.7 indent level is 1 Auxiliary fuel supply device
[List of Pre Grant Publications for class 123 subclass 179.16][List of Patents for class 123 subclass 179.16]179.16 Subclass 179.16 indent level is 1 With fuel or intake air control
 [List of Pre Grant Publications for class 123 subclass 179.19][List of Patents for class 123 subclass 179.19]179.19 Subclass 179.19 indent level is 1 Includes auxiliary internal combustion engine
 [List of Pre Grant Publications for class 123 subclass 179.21][List of Patents for class 123 subclass 179.21]179.21 Subclass 179.21 indent level is 1 With charge or cylinder heating
 [List of Pre Grant Publications for class 123 subclass 179.22][List of Patents for class 123 subclass 179.22]179.22 Subclass 179.22 indent level is 1 Inertia type
 [List of Pre Grant Publications for class 123 subclass 179.24][List of Patents for class 123 subclass 179.24]179.24 Subclass 179.24 indent level is 1 Either power or manual starting device
[List of Pre Grant Publications for class 123 subclass 179.27][List of Patents for class 123 subclass 179.27]179.27 Subclass 179.27 indent level is 1 For airplane
[List of Pre Grant Publications for class 123 subclass 179.28][List of Patents for class 123 subclass 179.28]179.28 Subclass 179.28 indent level is 1 With electric generating means
 [List of Pre Grant Publications for class 123 subclass 179.31][List of Patents for class 123 subclass 179.31]179.31 Subclass 179.31 indent level is 1 Having fluid-driven starting motor
 [List of Pre Grant Publications for class 123 subclass 183.1][List of Patents for class 123 subclass 183.1]183.1 Subclass 183.1 indent level is 1 Gunpowder type
 [List of Pre Grant Publications for class 123 subclass 182.1][List of Patents for class 123 subclass 182.1]182.1 Subclass 182.1 indent level is 1 Compression relieving type
[List of Pre Grant Publications for class 123 subclass 179.25][List of Patents for class 123 subclass 179.25]179.25 Subclass 179.25 indent level is 1 Having specific mounting or drive connection for electric starter motor
[List of Pre Grant Publications for class 123 subclass 185.1][List of Patents for class 123 subclass 185.1]185.1 Subclass 185.1 indent level is 1 Mechanical
 [List of Pre Grant Publications for class 123 subclass 184.1][List of Patents for class 123 subclass 184.1]184.1 Subclass 184.1 indent level is 1 With auxiliary igniters
[List of Pre Grant Publications for class 123 subclass 184.21][List of Patents for class 123 subclass 184.21]184.21 INTAKE MANIFOLD
[List of Pre Grant Publications for class 123 subclass 142.5R][List of Patents for class 123 subclass 142.5R]  142.5R WITH HEATING MEANS
[List of Pre Grant Publications for class 123 subclass 657][List of Patents for class 123 subclass 657]657 COMBUSTION CHAMBER
[List of Pre Grant Publications for class 123 subclass 193.1][List of Patents for class 123 subclass 193.1]193.1 PARTICULAR PISTON AND ENCLOSING CYLINDER CONSTRUCTION
[List of Pre Grant Publications for class 123 subclass 188.1][List of Patents for class 123 subclass 188.1]188.1 VALVE
[List of Pre Grant Publications for class 123 subclass 195R][List of Patents for class 123 subclass 195R]  195R FRAME CONSTRUCTION
[List of Pre Grant Publications for class 123 subclass 196R][List of Patents for class 123 subclass 196R]  196R LUBRICATORS
[List of Pre Grant Publications for class 123 subclass 198R][List of Patents for class 123 subclass 198R]  198R ACCESSORIES
 
FOREIGN ART COLLECTIONS
 
      FOR000          CLASS-RELATED FOREIGN DOCUMENTS
Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.
     STARTING DEVICE
      FOR100          Subclass FOR100 indent level is 1 Spark delaying (123/186.1)
  FOR101          SPARK IGNITION TIMING CONTROL (123/406)
  FOR102          Subclass FOR102 indent level is 1 Vacuum timing control (123/407)
      FOR107          Subclass FOR107 indent level is 1 Barometric pressure responsive controller (123/412)
      FOR108          Subclass FOR108 indent level is 1 By mechanical or hydraulic link to throttle valve or accelerator (123/413)
      FOR109          Subclass FOR109 indent level is 1 Having engine shaft position sensor (123/414)
      FOR110          Subclass FOR110 indent level is 1 Analog electronic control (123/415)
  FOR111          Subclass FOR111 indent level is 1 Digital electronic control (123/416)
      FOR112          Subclass FOR112 indent level is 2 Having microprocessor (123/417)
  FOR113          Subclass FOR113 indent level is 1 Speed responsive (123/418)
      FOR116          Subclass FOR116 indent level is 1 Ambient or engine temperature responsive (123/421)
      FOR117          Subclass FOR117 indent level is 1 Acceleration responsive (123/422)
      FOR118          Subclass FOR118 indent level is 1 Deceleration responsive (123/423)
      FOR119          Subclass FOR119 indent level is 1 Starting or cold running condition responsive (123/424)
      FOR120          Subclass FOR120 indent level is 1 Cylinder pressure or cylinder temperature responsive (123/425)
      FOR121          Subclass FOR121 indent level is 1 Feedback correction (123/426)
      FOR122          Subclass FOR122 indent level is 1 Timing control derived from ignition capacitor (123/427)
      FOR123          Subclass FOR123 indent level is 1 Having circuit that alters response of an oscillatory engine shaft position sensing circuit (123/428)
  FOR124          Subclass FOR124 indent level is 1 Exhaust gas used with the combustible mixture (e.g., emission control (e.g.r. valve) (123/568)
 
DIGESTS
 
 [List of Pre Grant Publications for class 123 subclass DIG1][List of Patents for class 123 subclass DIG1] DIG1 INTERCHANGEABLE
 [List of Pre Grant Publications for class 123 subclass DIG2][List of Patents for class 123 subclass DIG2] DIG2 ACCUMULATED FUEL RETURN TO TANK OR ENGINE-INDUCTION SYSTEM
 [List of Pre Grant Publications for class 123 subclass DIG3][List of Patents for class 123 subclass DIG3] DIG3 MODEL
 [List of Pre Grant Publications for class 123 subclass DIG4][List of Patents for class 123 subclass DIG4] DIG4 STRATIFICATION
 [List of Pre Grant Publications for class 123 subclass DIG5][List of Patents for class 123 subclass DIG5] DIG5 CRANKCASE PRESSURE-OPERATED PUMPS
 [List of Pre Grant Publications for class 123 subclass DIG6][List of Patents for class 123 subclass DIG6] DIG6 DETACHABLE
 [List of Pre Grant Publications for class 123 subclass DIG7][List of Patents for class 123 subclass DIG7] DIG7 CONVERTIBLE
 [List of Pre Grant Publications for class 123 subclass DIG8][List of Patents for class 123 subclass DIG8] DIG8 MULTIPLE ENGINE UNITS
 [List of Pre Grant Publications for class 123 subclass DIG9][List of Patents for class 123 subclass DIG9] DIG9 FLAME IGNITION
 [List of Pre Grant Publications for class 123 subclass DIG10][List of Patents for class 123 subclass DIG10] DIG10 FLUIDIC AMPLIFIER FUEL CONTROL
 [List of Pre Grant Publications for class 123 subclass DIG11][List of Patents for class 123 subclass DIG11] DIG11 ANTIDIESELING (STOPPING)
 [List of Pre Grant Publications for class 123 subclass DIG12][List of Patents for class 123 subclass DIG12] DIG12 HYDROGEN
 [List of Pre Grant Publications for class 123 subclass DIG13][List of Patents for class 123 subclass DIG13] DIG13 GAS
United States Patent and Trademark Office