LABEL - Class 435
LAC - Class 428
LACED-FASTENER* - Class 024
LAGB - Class 438
LAMINA - Class 156
LAMPS - Class 315
LAND - Classes 257, 438
LAND PATTERN - Class 257
LANDING* - Class 187
LANGMUIR-BLODGETT FILM - Class 977
LANGUAGE - Class 704
LANOLIN - Classes 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106
LANTHANIDE ELEMENTS - Class 257
LANTHANIDE* - Class 075
LANTHANIDE* - Class 420
LASER - Class 372
LAST - Class 425
LATCHING/LATCHED/LATCHUP - Class 257
LATCH-OR LATCHING-BOLT - Class 070
LATERAL - Classes 172, 226
LATID - Class 438
LATTICE CONSTANT - Class 117
LAW OF A MACHINE - Class 425
LAYER - Classes 112, 404, 428, 451
LAYER* - Class 349
LAYER* - Class 414
LB - Class 438
LC RESONATOR - Class 331
LCCC - Class 257
LCCD - Class 438
LCD - Class 438
LDCC - Class 438
LDD - Class 438
LEACHING - Classes 423, 588
LEAD - Class 257
LEAD FRAME - Class 257
LEAD-IN - Class 313
LEAF - Classes 016, 281, 283, 462
LEAF SPRING - Class 267
LEAKAGE CURRENT - Class 257
LEC - Classes 117, 438
LECHER LINES - Class 330
LECITHIN - Classes 106, 106, 106, 106
LED - Class 438
LEED - Class 438
LEK - Class 438
LENS - Class 351
LENS REPAIR DEVICES - Class 351
LEVEL* - Class 414
LEVELING AGENT* - Class 516
LEVER - Class 049
LIBRARY - Class 506
LIFETIME - Class 257
LIFT-OFF - Class 438
LIGAND - Class 435
LIGHT - Class 372
LIGHT EMITTING DIODE (LED) - Class 257
LIGHT FLUX - Class 396
LIGHT METAL - Class 532
LIGHT METAL* - Class 075
LIGHT METALS - Class 257
LIGHT PARALLELING STRUCTURE - Class 353
LIGHT POLARIZING LENSES - Class 351
LIGHT SOURCE - Classes 355, 362, 399
LIGHT TRANSMITTING ROD - Class 385
LIGHT, VISIBLE LIGHT - Classes 356, 359, 372
LIGNIN - Classes 510, 520
LIGNIN DERIVATIVE - Class 520
LINE CIRCUIT - Class 363
LINE DEFECT - Class 257
LINEAR MOVEMENT MOTORS - Class 318
LINER - Class 166
LINE-SPACE - Class 400
LINGUISTICS - Class 704
LINING(*) - Class 412
LINK - Class 049
LINOLEIC ACID - Class 516
LINOLENIC ACID - Class 516
LIPID - Class 977
LIPOSOME - Class 977
LIQUID - Classes 210, 510
LIQUID SORBENT - Classes 095, 096
LIQUID-LIQUID EXTRACTION - Class 423
LIQUID-PHASE SYNTHESIS - Class 506
LOAD - Classes 330, 388
LOAD CIRCUIT - Classes 322, 323
LOAD DEVICE - Classes 315, 475
LOAD LASHING RETAINER - Class 410
LOAD, LOAD DEVICE, OR LOAD CIRCUIT - Class 320
LOAD: - Class 477
LOAD-BEARING - Class 052
LOADED ANTENNA - Class 343
LOADED LINES - Class 333
LOCAL AREA NETWORK (LAN) - Class 370
LOCAL OSCILLATOR - Class 725
LOCAL OXIDE CMOS (LOCMOS) - Class 257
LOCKING MEANS* - Class 024
LOCOS - Classes 257, 438
LOG - Class 144
LOGIC - Class 326
LONG LINE - Classes 330, 333
LONG LINE ELEMENT - Classes 330, 333
LONGITUDINAL - Classes 172, 226
LOOP - Class 352
LOOP PATH - Class 330
LOPED - Class 438
LOW WORK FUNCTION ELECTRODE (cold cathode, cathodes containing or coated with electron emissive material) - Class 313
LOWER-CASE - Class 400
LPCVD - Class 438
LPE - Class 438
LRP - Class 438
LSI - Class 438
LSSL - Class 438
LST - Class 438
LTCC - Class 438
LTG - Class 438
LTO - Class 438
LUMBER - Class 144
LUMINESCENCE - Classes 257, 438
LUMPED PARAMETERS OR IMPEDANCES - Class 333