| Class 338 | ELECTRICAL RESISTORS |
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![[List of Pre Grant Publications for class 338 subclass 1]](../as.gif) | ![[List of Patents for class 338 subclass 1]](../ps.gif) | 1 | COHERER TYPE |
| | 2 | STRAIN GAUGE TYPE |
| | 3 |  With temperature compensation |
| | 4 | Fluid- or gas pressure-actuated |
| | 5 | Dynamometer type |
| | 6 | Extensometer type |
| | 7 | RESISTANCE VALUE TEMPERATURE-COMPENSATED |
| | 11 | REFLECTOR DIRECTS HEAT ON ELEMENT |
| | 12 | MOVABLE MAGNET ACTUATES RESISTOR THROUGH HOUSING OR PARTITION |
| | 13 | RESISTANCE VALUE RESPONSIVE TO A CONDITION |
| | 14 | Plural conditions |
| | 15 | Photoconductive (e.g., light sensitive) |
| | 16 |  With vibration control |
| | 17 | Plural resistance elements (e.g., mosaic) |
| | 18 | Infrared radiation |
| | 19 | With transparent housing |
| | 20 | Current and/or voltage (e.g., ballast resistor) |
| | 25 | Ambient temperature |
| | 26 | Cable or tape type (e.g., fire-detecting cable) |
| | 27 | Liquid contact or element |
| | 28 | Probe type |
| | 31 | Mechanically adjustable or variable |
| | 32R | Magnetic field or compass (e.g., Hall effect type) |
| | 33 | Float actuator |
| | 34 | Gas, vapor, or moisture absorbing or collecting |
| | 36 | Fluid- or gas pressure-actuated |
| | 37 | Vehicle tire inflation |
| | 38 | Liquid resistance element or contact |
| | 39 | Piston |
| | 40 | Bourdon tube |
| | 41 | Bellows or capsule |
| | 42 | Diaphragm |
| | 43 | Gravity stabilized or inertia actuator |
| | 47 | Force-actuated |
| | 48 | PLURAL SEPARATE DIVERSE RESISTORS |
| | 49 | SHUNT TYPE |
| | 50 | MOUNTED ON WHEELS OR VEHICLE |
| | 51 | WITH HEAT DISSIPATING PROJECTIONS (E.G., VANES) |
| | 53 | WITH COOLING GAS OR LIQUID CIRCULATION |
| | 54 | Element granular, powdered, or stacked between terminals |
| | 55 | With cooling liquid circulation |
| | 57 | Vented or ventilating casing or housing |
| | 58 | Ventilated helical or zigzag element |
| | 59 | WITH HEAT-STORING |
| | 60 | WITH CAPACITY-REDUCING |
| | 61 | WITH INDUCTANCE-REDUCING |
| | 64 | WITH ELECTRICAL SHIELD |
| | 66 | IGNITION INTERFERENCE SUPPRESSOR TYPE |
| | 67 | WITH DIVERSE NONELECTRICAL DEVICE (E.G., MECHANICAL OR CHEMICAL) |
| | 68 | MECHANICALLY VARIABLE (E.G., RHEOSTAT) |
| | 69 | Musical instrument playing key actuated |
| | 70 | In or on lamp socket |
| | 71 | Resistor surfaces pressed together (e.g., compressible type) |
| | 72 | Resistor with intervening connector between contact and element (e.g., taps) |
| | 73 | Resistor with contact angularly slidable on element |
| | 74 | Resistor with contact rectilinearly slidable on element |
| | 75 | With resistor cleaner |
| | 76 | Interchangeable resistors of different resistance value |
| | 77 | Plug boxes |
| | 78 | With current reversing (e.g., reversing rheostat) |
| | 79 | With element winding and/or unwinding |
| | 80 | Liquid resistance element |
| | 81 | Electrode separable from liquid element for switching |
| | 82 | Adjustable insulating barrier between electrodes |
| | 83 | Variable electrode separation |
| | 86 | Level of liquid element adjustable on electrodes (e.g., electrodes move up and down in element) |
| | 87 | Contact adjustably inserted into resistance element (e.g., penetrating type) |
| | 89 | Mathematical function (e.g., sine-cosine potentiometer) |
| | 92 | Resistance element adjustably short-circuited |
| | 93 | Compressible spring type |
| | 94 | Liquid contact |
| | 95 | With intervening structure between element and short-circuiting means (e.g., taps) |
| | 96 | Spring contact strip progressively pressed along element |
| | 97 | Unitary movable contact electrically bridges resistance portions |
| | 98 | With motion or vibration damping means (e.g., dashpots) |
| | 99 | Surfaces pressed together (e.g., compressible type) |
| | 100 | Granular |
| | 101 | Pile type |
| | 102 |  With contactor moving along pile |
| | 103 | With electromagnetic operator (e.g., electric motor) |
| | 104 |  Force applied at both ends of pile |
| | 105 | With diaphragm-type biasing spring |
| | 106 | With initial pressure adjustment |
| | 107 | With electromagnetic holder |
| | 108 | Pedal- or treadle-operated |
| | 109 | With initial pressure adjustment |
| | 110 | With switch actuated by resistor actuator |
| | 111 | With intervening conducting structure |
| | 112 | Contact surface area of piles variable |
| | 113 | With resilient pressure-applying linkage |
| | 114 | Deformable |
| | 115 | Element in piled or stacked layers |
| | 116 | With electromagnetic operator (e.g., electric motor) |
| | 117 | Slidable coextensive helical and linear contacts |
| | 118 | Movable contact electrically adjustable over length of resistance element |
| | 119 | With contact position indicating lamp |
| | 120 | Additional resistor adjustably shunts part of resistance element (e.g., varifunction type |
| | 121 | With nonlinearity correction |
| | 122 | Coarse and fine resistance elements |
| | 125 | Unitary movable contact electrically bridges plural resistance elements |
| | 128 | Plural |
| | 129 | Sequentially operated |
| | 130 | Ganged |
| | 131 | Resistors individually adjustable |
| | 132 | Resistors in tandem along rotary shaft or coupling |
| | 133 | Rectilinearly operated |
| | 134 | Individually operated concentric shaft type |
| | 135 | With zero setting or phasing |
| | 136 | Contact clamped on resistance element |
| | 137 | Plural contacts adjustable over single resistance element |
| | 138 | Element tapered |
| | 139 | Portion of element shorted |
| | 140 | With intervening connector between contact and element (e.g., taps) |
| | 141 | Helical or wound |
| | 142 | Element forms a coating |
| | 143 | Contact moves along turns of helical resistance element |
| | 144 | Contact lifts element from core |
| | 145 | Helical resistance element moves |
| | 146 | With helical collector parallel to helical element |
| | 147 | Resistor formed as a flat spiral |
| | 148 | With helical screw for moving the contact |
| | 149 | With contact stop |
| | 150 | Resistance element moves |
| | 153 | Contact operated by pedal or treadle |
| | 154 | With a flexible conductive strip separating the movable contact and the resistance element or taps |
| | 155 | Contact rocks along element or taps |
| | 156 | With liquid contact |
| | 157 | Contact rolls along element or taps |
| | 159 | With heat conducting or distributing path |
| | 160 | Contact slides along in contact with element |
| | 161 | With element casing open over contact track |
| | 162 | Contact angularly slidable |
| | 163 | With knob forming casing or covering |
| | 164 | Hermetically sealed housing |
| | 165 | With elongated rectilinear resistance element |
| | 166 | With removable actuating shaft or key |
| | 167 | Spring-loaded contact |
| | 168 | With flexible lead-in to contact |
| | 169 | Contact pressure adjustable |
| | 170 | With contact biasing spring on contact arm or carrier |
| | 171 | With plural contact portions |
| | 172 | With switching |
| | 174 | With collector ring |
| | 176 | Contact rectilinearly slidable |
| | 184 | With housing |
| | 185 | With intervening connector between contact and element (e.g., taps) |
| | 195 | Resistance value varied by removing or adding material |
| | 196 | With resistor actuator position indicator |
| | 197 | With support |
| | 198 | With switch actuated by resistor actuator |
| | 199 | With housing |
| | 200 | With switch |
| | 202 | MOVABLE CONTACT STRUCTURE |
| | 203 | READILY SEVERABLE INTO INDEPENDENT RESISTORS |
| | 204 | ELEMENT IN LAYERS PILED OR STACKED BETWEEN TERMINALS |
| | 206 | EXPANDED METAL TYPE |
| | 207 | ELEMENT AND BASE PERMANENTLY FOLDED OR ROLLED |
| | 208 | MESH, WOVEN, OR BRAIDED RESISTANCE ELEMENT |
| | 209 | EXTENSIBLE |
| | 210 | FLEXIBLE OR FOLDING |
| | 215 | WITH SWITCH |
| | 216 | IN COAXIAL TRANSMISSION LINE OR WAVE GUIDE |
| | 217 | TAPERED ELEMENT |
| | 219 | IN OR ON LAMP SOCKET OR BASE |
| | 220 | IN DETACHABLE ELECTRICAL CONNECTOR |
| | 221 | DETACHABLE PLUG-TYPE RESISTOR UNIT |
| | 222 | WITH LIQUID ELEMENT |
| | 223 | GRANULAR OR POWDERED ELEMENT |
| | 226 | INCASED, EMBEDDED, OR HOUSED |
| | 227 | With resistance value indicator |
| | 228 | Casing extends through plate |
| | 229 | Probe type |
| | 230 | Metal casing or housing cast around element |
| | 231 | In liquid |
| | 232 | Casing or housing readily openable and/or separable from element |
| | 234 | With gaseous or vacuum spacing between element and casing or housing |
| | 238 | Element inpowdered insulation with outer metallic sheath |
| | 243 | Element in insulation with outer metallic sheath |
| | 244 | Insulation coated on conducting liner |
| | 245 | Entire insulation or sheath formed as a coating |
| | 246 | With insulation and sheath external and internal to element |
| | 247 | Plural part sheath |
| | 250 | Insulation formed and hardened in situ (e.g., molded) |
| | 251 | Sheath embraces or folds over insulation |
| | 252 | Element embedded or enclosed in groove or recess |
| | 254 | Flattened resistance element between flat layers |
| | 256 | Casing or housing formed in plural layers external to element |
| | 258 | Resistance element formed as a coating on interior of casing or housing |
| | 259 | Wound, braided, or woven casing or housing |
| | 260 | Plural resistors |
| | 262 | Casing or housing formed as a coating |
| | 267 | Helical or wound element |
| | 268 | Preformed sleeve engaging over element |
| | 269 | Casing or housing formed on and hardened on resistor (e.g., molded) |
| | 270 | Element coiled on a core |
| | 271 | Terminal forms casing or housing |
| | 272 | Terminal or lead surrounds and secured to casing or housing |
| | 273 | Terminal or lead extends into end of elongated casing or housing |
| | 275 | Casing or housing formed on and hardened on resistor (e.g., molded) |
| | 276 | Terminal or lead extends through casing or housing wall |
| | 277 | WITH PROTECTING STRUCTURE SPACED FROM ELEMENT OR TERMINAL |
| | 278 | EDGEWISE COILED HELICAL STRIP RESISTANCE ELEMENT |
| | 279 | RIBBON RESISTANCE ELEMENT BENT OR CURVED ON FLAT SIDE |
| | 283 | ZIGZAG OR SINUOUS RESISTANCE ELEMENT |
| | 284 | Element includes integral stiffening structure |
| | 285 | Element extends along groove in base |
| | 286 | Helical |
| | 287 | Compound or multiple zigzag |
| | 289 | Element includes conductive jumpers or spacers |
| | 290 | Element projects in or through an opening or a slot in a support or frame |
| | 291 | With transverse element stiffening or reinforcing rod or strip |
| | 292 | Element forms a coating |
| | 293 | Planar |
| | 294 | Cylindrical |
| | 295 | PLURAL RESISTANCE ELEMENTS CONNECTED BY A JUMPER OR SPACER |
| | 296 | HELICAL OR WOUND RESISTANCE ELEMENT |
| | 297 | Flat spiral winding |
| | 298 | Compound helix or winding |
| | 299 | Plural supported helices or windings |
| | 300 | Element forms a coating |
| | 301 | Element coiled on flat or ribbon base |
| | 302 | Element coiled on cylindrical or prismatic core |
| | 304 | Element on frame or support |
| | 306 | WITH BASE EXTENDING ALONG RESISTANCE ELEMENT |
| | 307 | Resistance element and/or terminals printed or marked on base |
| | 308 | Resistance element coated on base |
| | 310 | Resistance element extends through base |
| | 311 | Resistance element mounted in a groove in base |
| | 312 | Terminal extends in or through base |
| | 313 | Terminal embraces base |
| | 314 | Resistance element and base formed in layers |
| | 315 | WITH MOUNTING OR SUPPORTING MEANS |
| | 316 | Compensates for or permits resistor |
| | 317 | Threading or projecting through the support |
| | 318 | Extending between supports |
| | 320 | Plural resistors |
| | 321 | RESISTANCE ELEMENT CORES AND FRAMES |
| | 322 | WITH TERMINAL |
| | 323 | Terminal tapped on resistance element |
| | 324 | Diverse terminals |
| | 325 | With three or more terminals |
| | 326 | Terminals adjacent (e.g., looped resistor) |
| | 327 | Terminal coated on resistance element |
| | 328 | Terminal and resistance element disposed in flat layers |
| | 329 | Welded or soldered |
| | 330 | Terminal and resistance element integral |
| | 331 | Resistance element surrounds terminal |
| | 332 | Terminal embraces or surrounds resistance element |
| | 333 | PARTICULAR CONFIGURATION AND/OR DIMENSION |
| | 334 | MISCELLANEOUS |
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