Index to the US Patent Classification

Index to the US Patent Classification

What follows is part of the Index to the US Manual of Classifications for patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retreive patent titles by entering the class/subclass in the box below.


Enter a class/subclass code here to get a list of patent titles. Use any of the following forms:
363-131 121-55A 14-.5
that is, no embedded spaces, class and subclass seperated by a dash, and any subclass letters capitalized. Currently Design Patent titles (those in the classes of the form Dxx.yy) are not retreivable.

Enter class/subclass code:


LABEL
  CLOTHING LABEL ....................D05/63+
  DESIGN ............................D20/22+
  EXHIBITING ........................283/81+
  GUMMING APPARATUS .................118
     AND APPLYING ...................156
     DYNAMIC INFORMATION STORAGE
       AND RETRIERAL ................360
  IDENTIFYING PLUG TOBACCO ..........131/368
  LABEL OR TAPE EMBOSSING TOOL ......D18/19+
  LABELS ............................283/81+
     MAGNETIC BUBBLES ...............365/1+
     READ ONLY MEMORIES .............365/97+
     STATIC INFORMATION STORAGE
       AND RETRIERAL ................365
  OBLITERATING STAMP SCARIFIER ......81/9.21
  X-ART .............................493/961*

LABELING (SEE DIGESTS 1-51) ......... 156
  CIGARETTE PACKAGING MACHINE .......131/281+
  FABRICS OR DEFORMABLE SURFACES ....156/DIG.19
  FEEDING ...........................156/DIG.28
  FLAT RIGID SURFACES ...............156/DIG.1
  MAGAZINES .........................156/DIG.29
  MANUAL DISPENSER ..................156/DIG.48
  NON-FLAT SURFACES .................156/DIG.5
  PLUG TOBACCO ......................131/113+
  TOBACCO PRODUCTS ..................131/106

LABORATORY APPARATUS ................ 422/99+
  BURETTES ..........................422/100
  CABINET ...........................312/209
  ELEMENTS ..........................422/99+
  LABORATORY EQUIPMENT ..............D24/232+
  MONITOR NUCLEAR ...................250/472.1
     SCINTILLATION TYPE .............250/483.1

LABYRINTH ........................... 472/62
  MEMORY SYSTEMS
     DYNAMIC ELECTRIC INFORMATION
       STORAGE AND RETRIVAL .........369
     DYNAMIC MAGNETIC INFORMATION
       STORAGE AND RETRIVAL .........360
  PACKING ...........................277/53+


LACE
  DIGEST ART ........................D05/47+
  TABLE CLOTH .......................D06/617+
  TIPPING ...........................425/807*

LACES AND LACINGS
  BELT END CONNECTORS ...............24/34
  BELT OPERATED CORSET CLOSURE ......450/119
  DESIGN,NARROW .....................D05/11+
  GARMENT SUPPORTS ..................2/326+
  KNOT OR END HOLDERS ...............24/712.1+
  LACING AND UNLACING MACHINES ......12/58.5
  LACING DEVICE .....................24/712+
  MAKING ............................87
     FIBER DESTRUCTION BY CHEMICALS .8/114.6
  PACKAGES FOR ......................206/49
  SEWING MACHINE FOR LACING OR
     WHIPPING .......................112/121.2
  SHOE LACING MACHINE ...............12/58.5
  SHOELACE FASTENERS ................24/712.2+
  SHOELACES .........................24/715.4+
     DESIGN .........................D02/978
  STUD MAKING .......................29/12
  STUD SETTING MACHINE ..............227/51+
  TIPPING ...........................72/282

LACQUER (SEE VARNISH)
  CELLULOSE ETHER OR ESTER
     (SEE ALSO SYNTHETIC RESIN OR
     NATURAL RUBBER COMPOSITIONS) ...106/169
  SYNTHETIC RESIN OR NATURAL RUBBER (SEE CLASS 523, 524)

LACROSSE ............................ 273/326

LACTAMS
  CAPROLACTAM .......................540/485+
  DELTA LACTAMS
     EG ALPHA PIPERIDONE ............546/243
  GAMMA LACTAMS, EG ALPHA PYRROLIDINE548/543+
  ISATINS ...........................548/485
  NAPHTHOSTYRILS ....................548/437


LACTIC ACID ......................... 562/589
  PREPARATION FROM CARBOHYDRATES ....562/515
     FERMENTATION ...................435/139

LACTIDE ............................. 549/274

LACTOMETER .......................... 73/32.R+

LACTONES ............................ 549/263+
  POLY HETERO O
     5 MEMBERED RING ................549/296
     6 MEMBERED RING ................549/274
     7 MEMBERED RING ................549/267

LACTOSE ............................. 127/31


LADDERS ............................. 182/194
  ATTACHED SUPPORTS .................248/210
  BRACKET ATTACHMENTS ...............248/210+
     SCAFFOLD OR SHELF TYPE .........248/238
  CHUTE OR ESCAPE COMBINED ..........182/49
  COLLAPSIBLE .......................182/156+
  CONVERTIBLE .......................182/21+
     TO CHAIR .......................182/33+
     TO SCAFFOLD ....................182/27
  DESIGN ............................D25/62+
  DOOR COMBINED .....................182/77+
  ELEVATING PLATFORM ................182/101+
  EXTENSION .........................182/207+
  FIRE TRUCKS .......................280/4
  HOSE OR NOZZLE SUPPORT ............248/76
     ATTACHED .......................248/77+
  LAND VEHICLE ......................182/127
  PLATFORM DETACHABLE ...............182/120+
  PROPPED ...........................182/165+
  SAFETY DEVICES FOR ................182/107+
  SCAFFOLD SUPPORT ..................182/116+
  SELF SUSTAINING ...................182/180
  SLEEPING CAR ......................105/326
  WALL OR FLOOR ATTACHED ............182/93+

LADLES .............................. 141/110
  GLASS HANDLING ....................65/324+
  HOIST TRAVERSING ..................212/130
  KITCHEN ...........................30/324+
     DESIGN .........................D07/691
  METAL DISPENSING TYPE .............222
     MOLDING DEVICE WITH ............164/335+

LAGGING
  REELS .............................206/398+

LAKE
  DYE FIXING WITH ...................8
  MORDANTING METAL ..................8
     TANNATE COMBINED ...............8/596
  PIGMENTS CONTAINING ...............106/402


LAMINATE SEE CLASS 428 GLOSSARY ..... 428
  ABRASIVE TOOL
     FLEXIBLE CYLINDRICAL ...........51/358+
     MAKING .........................51/297
     RIGID CYLINDRICAL ..............51/207
  BELT TRANSMISSION .................474/237+
  BRUSHES ROTARY ....................15/181
  BUILDING CONSTRUCTIONS ............52/408+
     CURVILINEAR ....................52/267
  BUILDING PANEL ....................52/662
  CONDUCTORS INSULATED ..............174/120.C+
  ELECTRODE FOR ELECTROLYSIS ........204/290.R
  GLASS .............................428/426+
     MAKING .........................156/99+
  HINGES ............................16/372
  INSOLES ...........................36/44
  MAKING ............................156
     COATING AND STRIPPING ..........264
     COATING APPARATUS ..............118
     COATING PROCESSES ..............427
  METALLIC ..........................428/615+
  NUCLEAR FUEL STRUCTURES ...........376/416
  PANEL FENCES ......................256/24+
  PIPE ..............................138/140+
     FLEXIBLE .......................138/137+
  PULLEYS ...........................474/166+
  RAIL BONDS ........................238/14.1+
  SHOE PARTS ........................12
     SOLE LEVELING ..................12/33+
  SOLES .............................36/30.R
  STENCILS ..........................101/128.21
  WIPERS, EG BLACKBOARD ERASERS .....15/223+
  WOOD ..............................144

LAMPBLACK ........................... 423/445.R+
  AGGLOMERATING .....................23/314
  APPARATUS .........................422/150+
  ELECTROSTATIC FIELD OR ELECTRICAL
     DISCHARGE PREPARATION ..........204/173


LAMPS (SEE ALSO ELECTRODE)
  ARC ...............................313
  BARREL ILLUMINATION ...............362/154
  BICYCLE ...........................362/72
  BURNER
  CAMERA ATTACHED LIGHT .............D16/239+
  CANDLE IN LANTERN .................362/161
  CANDLE SIMULATING .................362/157+
  CARBURETORS FOR ...................48/144+
  CHIMNEY CLEANERS ..................15/211+
  CHIMNEYS ..........................362/312+
  CONSUMABLE ELECTRODE TYPE .........314
  DAYLIGHT ILLUMINATING FIXTURE .....362/1
  DAYLIGHT LAMP STRUCTURE ...........313/110+
     FLUORESCENT MATERIAL TYPE ......313/486+
  DESIGN ............................D26
  DIAGNOSTIC ........................128/23
  DIMMER STRUCTURE ..................323/905*
  DISCHARGE DEVICE, ENERGIZING ......315
  DISINFECTING, ULTRAVIOLET .........250/504.R+
  DOUGH RAISER ......................126/282
  EGG CANDLING
     BOX WITH LAMP CONTROL ..........356/67
     LAMP ATTACHMENT ................356/68
  ELECTRIC ..........................313
     ARC LAMP .......................313/41
     ARC LAMP ELECTRODE FEEDING .....314
     ARC LAMP GAS OR VAPOR ..........313/567+
     ARC LAMP MERCURY VAPOR .........313/163+
     AUTOMATIC SUBSTITUTION OF       315/65
       FILAMENT .....................315/65
     CIRCUIT ELEMENT IN MULTIPLE     315/64
       FILAMENT .....................315/64+
     CONNECTORS FOR CLUSTERS OF .....439/638+
     CONSUMABLE ELECTRODE ...........314
     EXHAUSTING .....................141/65
     FILAMENT COMPOSITIONS ..........252/500+
     FILAMENT FOR GAS OR VAPOR LAMPS 313/341+
     FILAMENT SHAPES ................313/341+
     GAS FILLING ....................141/66
     GAS OR VAPOR ...................313/567+
     GLASSWORKING APPARATUS FOR      65/152
       MAKING .......................65/152+
     GLASSWORKING PROCESSES FOR      65/36
       MAKING .......................65/36+
     GLOW DISCHARGE .................313/567+
     INCANDESCENT BULB MANUFACTURING 445/27
     MERCURY VAPOR ..................313/567+
     MULTIPLE FILAMENT ..............313/316
     NERNST .........................313/14
     PORTABLE SELF CONTAINED ........362/157+
     REFLECTOR BUILT IN .............313/113+
     REPAIR APPARATUS ...............445/61
     REPAIR PROCESSES ...............445/2
     SOCKETS ........................439
     SOCKETS RHEOSTAT COMBINED ......338/70+
     SPACE DISCHARGE DEVICE          445
       MANUFACTURING ................445
     SYSTEMS OF SUPPLY FOR ..........315
  ELECTROPHOTOGRAPHIC COPIER ........355/228+
  EXTINGUISHING DEVICES .............431/144+
  FLASHLIGHT ........................362/208+
     CAMERA SHUTTER SYNCHRONIZED ....354/126
     PHOTOGRAPHIC TYPE ..............431/358+
  GLOBE OR BOWL .....................D26/118+
  HEATER ATTACHMENT .................126/255+
     TOOL ...........................126/235
  HEATING WITH ELECTRIC .............219/552+
  ILLUMINATED
     SIGN ATTACHMENT ................40/553+
     SIGN LAMP BOX ..................40/564+
  INCANDESCENT ......................D26/2+
  INSPECTION ........................362/138
  MAGNESIUM .........................431/99
  MINERS ............................362/164+
  NONWIRED SUPPLY
     HIGH FREQUENCY FIELD ...........315/248
     INDUCTION TYPE .................315/248
     RADIO ..........................315/149+
     TRANSFORMER IN LAMP ............315/57
  ORNAMENTAL BULB ...................220/2.1R+
     FLUORESCENT ....................313/493
     GAS OR VAPOR ...................313/567+
     REFLECTOR ......................313/113+
     SIGN ...........................40/541+
  PHOTOGRAPHIC LIGHTING .............362/3+
  PHOTOGRAPHIC SAFE LAMP ............362/803*
  POLE
     DECORATIVE ELEMENT .............52/301
  POST COMBINED WITH ................D26/67+
  SHADES ............................362/351+
     DESIGN .........................D26/118+
     MAKING .........................493/950*
     ROTATING .......................362/35
  SIGNAL LAMP, HORN COMBINED ........116/3
  SIGNALING DEVICES HAVING ..........340
     DESIGN .........................D10/111+
     SOCKET .........................D13/134
  STANDS ............................362/382+
  SWITCHBOARD .......................379/315+
     TESTING OF .....................379/20
  THERAPEUTIC .......................607/91+
  TOOL HEATER COMBINED ..............126/241
  VEHICLE ...........................362/61+
  WATER HEATER TYPE .................126/358
  WICK TRIMMERS .....................431/120
  WICKS .............................431/325


LAMPWORKING
  GLASS MANUFACTURING ...............65

LANCES
  BOMB ..............................102/371
  FISHING ...........................43/6
  METALLURGICAL .....................266/225+

LANCET .............................. 606/181+

LAND
  ANCHORS ...........................52/155+
  MARKERS FOR PLOWS .................172/126+
  ROLLERS ...........................404/122+

LAND VEHICLE SEE SPECIFIC TYPES ..... 280
  AIR BAGS ..........................280/728.R+
  AMPHIBIOUS BOATS
     AIRBORNE .......................244/50
     VERTICALLY ADJUSTABLE WHEELS ...280/43+
  ANIMAL DRAFT APPLIANCES ...........278
  ATTACHMENTS .......................280/727+
  AUXILIARY ARTICLE COMPARTMENTS
     ADD-ON DEBRIS CARRIER ..........224/273+
     BUILT-IN GENERAL ...............296/37.1+
  BODIES AND TOPS ...................296
     ON & OFF FREIGHT CONTAINER .....410/52+
  DUMPING ...........................298
  MECHANICAL MANUFACTUREING .........29/400.1+
  MOTOR DRIVEN ......................180
  PASSENGER SAFETY GUARDS ...........280/748+
  SEAT BELTS ........................280/801.R+
  SPACE TIRE COMPARTMENT ............296/37.2
  TIRES AND WHEELS RESILIENT ........152
  TOILETS ...........................4/458+
  VERTICALLY ADJUSTABLE WHEELS ......280/43+
  WHEEL SUBSTITUTES .................305
  WHEELS AND AXLES ..................301


LANDFILL ............................ 405/129

LANDING DEVICES
  AIRCRAFT
     CARRIERS .......................114/261
     FIELDS .........................244/114.R
     LANDING GEAR ...................244/100.R+
     RETARDING AND RESTRAINING ......244/110.R+
  ELEVATOR STOP .....................187/32+
     CHAIR ..........................187/75+
  FIELD OR PLATFORM, FLOATING
     ILLUMINATION ...................362/145+
     MATS ...........................404/35+
     MOORING ........................244/114.R+
     SEARCHLIGHT ....................362/145+
  MOVING TRAIN ......................104/19

LANGUAGE TEACHING ................... 434/156
  FORMS .............................283/46
     WRITING ........................283/45
  LABORATORY ........................434/157
  LABORATORY ........................434/319+

LANOLIN ............................. 552/544
  PURIFICATION ......................552/545+
  RECOVERY FROM WASH LIQUORS ........552/545

LANTERN
  DESIGN ............................D26/37+
  ELECTRIC ..........................362/261
     FLASHLIGHT .....................362/208
  HAND LANTERN SUPPORT ON VEHICLE ...362/61+
  HEATED DINNER BUCKET AND ..........126/267
  HEATER AND ........................126/209
  LANTERN SLIDE BINDERS .............40/152
  ORNAMENTAL ........................362/806*
     SLIDES .........................40/152+
  STORM .............................362/159+


LAP ROBE ............................ 2/46+
  HOLDER VEHICLE BODY COMBINED ......280/288.4+

LAPIDARY WORK ....................... 125/30.1

LAPPED SURFACING  SEE
 FACER CONSTRUCTION

LAPPET LOOMS ........................ 139/49

LAPPING ABRADING
  COMPOSITIONS ......................51/293+
  RIGID TOOL ........................51/204+
  WITHOUT TOOL ......................51/26+

LAPPING,CHEMICAL .................... 156/625+
  WHEELED VEHICLE COMBINED ..........280/288.4+

LARD
  RENDERING .........................554/8+
  SUBSTITUTES .......................426/601+

LARDING PINS ........................ 99/494

LARIATS ............................. 119/802+
  AMUSEMENT TYPE ....................446/247


LARNER JOHNSON TYPE INTERNAL
 HYDRAULIC VALVES ...................137/219+

LARYNGOSCOPES ....................... 128/10

LARYNX, ARTIFICIAL .................. 623/9

LARYNX, ELECTRIC .................... 381/70

LASER ............................... 372
  AMPLIFIERS ........................359/333+
  BEAM ..............................430/945*
     APPLICATIONS, OSCILLATORS
  COMMUNICATION SYSTEM ..............359/109+
  INSTRUMENTS WITH ..................33/DIG.21
  LASER INDUCED DIFFUSION OF
     IMPURITIES INTO SEMICONDUCTOR
     SUBSTRATES
     METHOD .........................437/16+
  MISC  CHEMICAL MANUFACTURE ........156/DIG.8
  OSCILLATORS
  PRINTER
     BEAM RECORDER ..................346/108
     ELECTRIC PHOTOGRAPHY ...........346/160+
     PHOTOCOMPOSITION ...............354/5+
  USED IN REACTION TO PREPARE
     INORGANIC COMPOUND .............204/157.41
  USED IN REACTION TO PREPARE
     ORGANIC COMPOUND ...............204/157.61
  USED IN REACTION TO PREPARE OR
     TREAT SYNTHETIC RESIN OR
     NATURAL RUBBER .................522/2

LASHES .............................. 231/4


LASHINGS
  BOAT ..............................114/381
  CARGO ON FREIGHT CARRIER ..........410/96
     FREIGHT CAR ....................105/375

LASSO ............................... 119/802+

LASTING
  CONTINENTAL TYPE MACHINE ..........12/10.7

LASTS
  DARNING ...........................223/100
  DELASTING MACHINES ................12/15.1
  DESIGN ............................D15/137
  INSERTING MACHINES ................12/15
  MACHINES FOR MAKING ...............12/7+
     DASH POTS ......................12/DIG.2
     FLUID ACTUATED .................12/DIG.1
     NAILING COMBINED ...............12/13.1+
     SEWING COMBINED ................12/13.2+
  PROCESSES FOR MAKING ..............12/145+
  REMOVING MACHINES .................12/15.1
  SHOE ..............................12/133.R+
  TOOLS .............................12/107.R+
  VULCANIZING BOOTS AND SHOES .......425/383
  WIRE ..............................12/7.9


LATCH (SEE LOCK)
  ACTUATORS FOR KNITTING MACHINES ...66/111+
  BOBBIN ............................112/188
  CLOSURE FASTENER ..................292
     ADJUSTABLE BACKSET .............292/1.5
  CLOSURE OPERATOR COMBINED .........49/279+
     STOVE DOOR .....................126/197
  DESIGN ............................D08/331+
  GATE ..............................D08/331+
  HINGE COMBINED ....................16/231
  LOCKS & OTHER HARDWARE ............D08/330+
  OPERATED CLUTCH ...................192/22+
  PROJECT RETRACT PEN ...............401/99+
  RELEASER CLOSURE FASTENER .........292/254+
  SWITCH COMBINED ...................20/318
  TRIP ..............................74/2+

LATENT IMAGE FORMATION
  ELECTROPHOTOGRAPHIC COPIER ........315/210+

LATEX
  BRASSIERE .........................450/36
  GIRDLE OR CORSET ..................450/97
  SYNTHETIC RUBBER OR NATURAL RUBBER
     CONTAINING (CLASS 523, 524)
     NATURAL RUBBER LATEX
       COAGULATING ..................528/936*
       CREAMING .....................528/937*
       PHYSICAL TREATING ............528/934*
       PRESERVING ...................528/935*

LATH ................................ 52
  HOLDERS ...........................144/288.5
  IMPERFORATE .......................52/443+
  SLAT TYPE .........................52/342+

LATHER FORMING
  FOAM MAKING .......................252/307
  GAS AND LIQUID CONTACT ............261
  LATHER MAKER ......................366/604*
  SPRAY TYPE ........................239/343


LATHES .............................. 82/117+
  ABRADING ATTACHMENTS FOR ..........51/259+
  BORING HORIZONTAL .................408
  CENTERS ...........................82/151+
  CHUCKS ............................279
  CUTOFF ............................82/46+
  CUTTERS AND CUTTER HOLDERS FOR ....407/66+
  DESIGN ............................D15/130
  DRILL HOLDER FOR ..................408/238
  MILLING ATTACHMENTS FOR ...........409/165
  PLANING ATTACHMENT FOR ............409/328
  PUNCHING ATTACHMENT FOR ...........83
  SPINNING AND FUSING SHEET METAL ...228
  STONEWORKING ......................368/10
  STRAIGHTENING SHAFTS IN ...........72/380+
  TURRET OR CAPSTAN .................29/33.J+
  WATCHMAKERS .......................968/724+
  WINDING AND REELING ATTACHMENTS
     FOR ............................242
  WOOD SAW FEED .....................83/704+
  WOOD SLICER STRIP CUTTING FEED ....144/165+
  WOOD TURNING ......................142
  WOOD VENEER LATHES ................144/209.R+

LATRINES ............................ 4/460+

LATROBES ............................ 126/523

LATTICE ............................. 52/660+
  FRAME FOR PANELS ..................52/455+
  NUCLEAR FUEL CORES ................376/346
  NUCLEAR FUEL CORES ................376/267
  TYPE PRODUCT
     STATIC MOLD ....................249/60
  WIRE
     MACHINES FOR MAKING ............140/25+

LAUNCHES ............................ 114


LAUNCHING
  AIRCRAFT ..........................244/63
  BOAT ..............................114/365
  LIFE BOAT .........................114/365+
  MARINE VESSELS ....................405/1
  TORPEDO ...........................114/238+
  TOY GLIDER ........................446/63+
  TOY ROCKET ........................446/212
  TOY VEHICLE .......................446/429+

LAUNDRY
  APPARATUS .........................68
     DESIGN .........................D32/6+
  BAG ...............................D32/36
     NET OR MESH TYPE FOR USE IN     383/117
       WASHING ......................383/117
  BLUING COMPOSITIONS ...............8/648
  COMBINED WASHER-DRIER MACHINE .....D32/5
  DRY CLEANING MACHINE ..............D32/10+
  DRYING ............................34
     COMBINED WASHING ...............68/19+
  HOUSEHOLD EQUIPMENT ...............D32/35+
  IRONING ...........................38
  MACHINERY .........................D32/6+
  METHODS ...........................8/137+
     MANIPULATIVE ...................8/147+
  SORTING ...........................209/937*
  STICKS ............................294/23.5
  TONGS .............................294/8.5

LAURIC ACID ......................... 554/1+

LAUROLACTAM ......................... 540/451+

LAURYL ALCOHOL ...................... 568/840
  PRODUCTION FROM COCONUT ACIDS .....568/876+


LAVATORY ............................ 4/650+
  BASIN SUPPORTS ....................4/643+
  BUILDING WALL ATTACHED ............52/34+
  LAVATORY ..........................D23/284+
  SOAP DISH WITH
     SOAP HANDLING MEANS ............206/77.1

LAW ENFORCEMENT COMPUTER APPLICATIONS
  ARTIFICIAL INTELLIGENCE ...........395/933*

LAWN
  AERATOR ...........................172/21+
  GRASS .............................PLT/90+
  MOWER (SEE HARVESTER) .............56/229+
     BAR HANDLE HARDWARE ............16/111.A
     CIRCUMFERENTIALLY SPACED BLADE .172/552
     DESIGN .........................D15/14+
     DISC TYPE ......................56/255+
     MOTOR OPERATED .................56/16.7+
     MOWER-TYPE TONGUE & CROSSBAR ...16/DIG.38
     REEL TYPE ......................56/249+
     SHARPENER ......................76/82.1
     SHARPENER ABRADING IN SITU .....51/246+
     SMALL ENGINE STARTERS ..........123/179.26
     SNOWPLOW COMBINED ..............37/243
     TOOL DRIVEN, LATERALLY EXTENDED 172/121
       BAR OR BLADE .................172/121
  RAKES .............................56/400.1+
  ROLLER ............................404/122+
  SPRINKLER .........................D23/214+
  SWEEPER ...........................D15/27
  SWINGS ............................297/245+
  TRIMMERS ..........................172/13+

LAXATIVE ............................ 424


LAYERS (SEE COMPOSITION; SHEET)
  BONDED ............................428
  ELECTROPLATING ....................205/170+
  EXPLOSIVE OR THERMIC
     COMPOSITION CONTAINING .........149/14+
  FILLING OF ARTICLES ...............53/531+
  FILTER ............................210/290
  FILTER SCREEN GAS SEPARATION ......55/486+
  LAYERING ..........................47/5.5
  NUCLEAR FUEL STRUCTURES ...........376/432
  RAILWAY TRACK .....................104/2+
  SHOE SOLE MACHINE .................12/29
  SIGNS MULTIPLE ....................40/615
  STATIC MOLD HAVING
     SUPER-IMPOSED METAL ............249/116
  STRUCTURALLY DEFINED ..............428/98+
     METALLIC .......................428/615+
  WINDING OF BOBBINS ................242/26

LAYING
  BUILDING FACINGS OR SHINGLES ......52/747+
  MINES .............................102/411+
  PAVING BLOCKS .....................404/99
  PIPE OR CABLE .....................405/154+
  SHOE MACHINE FOR ..................12/33+

LAYOUT DEVICE
  CLOTHES ...........................33/11+
  SHOES .............................33/4+

LAYS LOOM ........................... 139/188.R+

LAZY SUSAN .......................... D07/501


LAZY TONGS
  BRACKET ...........................248/277
  COLLAPSIBLE SUPPORTS ..............211/202
  DRAWBRIDGE ........................14/45
  ELEVATOR MOTOR ....................187/18
  EXTENSION LADDER ..................182/157+
  FIRE ESCAPE .......................182/40
  LINKAGE SYSTEM ....................74/521
  MAST OR TOWER .....................52/109
  PUSHING AND PULLING ELEMENTS ......254/122
  VEHICLE FENDER ....................293/27
  WINDOW OPERATORS ..................49/363

LEACHING (SEE DIFFUSING; EXTRACTING)
  APPARATUS .........................422/261+
     ELECTROLYTIC CELL COMBINED .....204/233+
     METALLURGICAL ..................266/101
     SUGAR STARCH CARBOHYDRATES .....127/3+
  PROCESSES
     ADSORBENT REACTIVATION .........502/20+
     ADSORBENT REACTIVATION          502/22
       WATER ONLY ...................502/22
     HYDROMETALLURGY ................75/711+
     INORGANIC COMPOUNDS ............423/210+


LEAD (SEE PENCIL)
  ACETATE ...........................556/105
  ALLOYS ............................420/563
     COPPER .........................420/491
     COPPER TIN .....................420/474
  BATTERY ...........................429/149+
  CHAMBER PROCESSES .................423/524
  COMPOUND INORGANIC ................423
     CARBONATE ......................423/433+
     CHROMATE .......................423/592
     ELECTROLYTIC SYNTHESIS OF
       CARBONATE ....................204/88
     HALIDE .........................423/462+
     OXIDE ..........................423/619
     PIGMENT FILLER OR AGGREGATE ....106/432+
  COMPOUND ORGANIC ..................556/81+
     STABILIZATION ..................556/3+
  ELECTROLYTIC SYNTHESIS
     AQUEOUS BATH ...................204/114+
     FUSED BATH .....................204/66
  FUSES .............................337/290+
  HEAT TREATMENT ....................148/706
  HYDROMETALLURGY ...................75/711+
  MISC  CHEMICAL MANUFACTURE ........156/DIG.85
  PASTE FOR BATTERIES ...............429/225+
     PROCESS OF MIXING ..............252/182.1
     PROCESS OF PUTTING ON GRID .....141/1.1
  PLATE .............................428/645
     ELECTROLYTIC ...................205/299
  PYROMETALLURGY ....................75/693+
     COMBINED WITH HYDROMETALLURGY ..75/432
  SAW ADJUSTMENTS ...................83/816+
  SHIELDS FOR RADIOACTIVITY .........250/515.1
  SHOT MAKING .......................29/1.22
     APPARATUS FOR COMMINUTING
       LIQUID .......................425/6+
     PROCESSES FOR COMMINUTING
       LIQUID .......................264/5+
  SOUNDING ..........................33/715+
  STYPHNATES ........................556/109
  TETRAETHYL ........................556/95
     FUEL CONTAINING ................44/454+

LEADED GLASS ........................ 428/38


LEADERS
  CATTLE ............................119/769+
     HALTERS ........................54/24+
  FAIR ..............................114/101
  FISHING ...........................43/44.98
     BOXES ..........................43/54.1+
  MAGNETIC RECORD TAPE OR WIRE ......360/131+

LEAF (SEE SPRING)
  BOOK BINDER SHEET .................402/79
  BURNER ............................D34/1.1
  EXTENSION TABLE
     CENTER .........................108/83+
     CIRCULAR SEGMENT ...............108/66
     DROP LEAF TYPE .................108/77+
     END ............................108/69+
  HINGES ............................16/387+
  MANIFOLDING .......................462/67+
     BOOKS COMBINED .................462/17+
     ENVELOPES COMBINED .............462/64+
     STRIPS AND BOOKS COMBINED ......462/7
     STRIPS COMBINED ................462/8+
  MEANS TO SELECT ...................40/532
  METALLIC TYPE ORNAMENTATION .......428/17+
     APPLYING APPARATUS .............156/540+
     APPLYING BY TRANSFER ...........156/230+
     PACKAGES .......................206/71
     TRANSFERS ......................428/914*
  MUSIC TURNERS .....................84/486
  PAPER .............................402/79
     BOOK ...........................281/38+
     STRIPS COMBINED ................281/2
  PRINTED MATTER ....................283/61
     SLIDING LEAF ...................283/65
  RESILIENT WHEEL ...................152/1+
  RESTS .............................248/441.1+
  ROTATABLE EXHIBITORS ..............40/493+
  SHEET MANIPULATIVE DEVICES
     FLIP, INSERT, LIFT, REMOVE .....402/80.R
     TRANSFER FORK ..................402/80.R
     TRANSFER POST ..................402/47
  SUPPORTS
     BINDER DEVICE RELEASABLY        402
       ENGAGING APERTURE OR          402
       NOTCH OF SHEET ...............402
     HINGE MOUNTED DISPLAYS .........40/530+
     HOLDERS COMBINED ...............248/441.1+
     NEWSPAPER TYPE .................281/45+
     PAPER FILE .....................211/169.1
  TOBACCO TREATING ..................131/290+


LEAK
  CATCHER ...........................137/312+
     DISPENSER COMBINED .............222/108+
     HEAT EXCHANGER COMBINED ........165/70
  DETECTORS
     COMPOSITION ....................252/68
     FLUID PRESSURE APPARATUS .......73/40+
     HEAT EXCHANGER COMBINED ........165/11.1
     NUCLEAR REACTOR CONTROL ........376/250
     NUCLEAR REACTOR CONTROL ........376/450
     PIPE JOINT .....................285/13
     SYSTEM IN SITU .................137/455+
  FLOATABLE MATTER, EG OIL, CONFINING405/60+
     OR COLLECTING ..................405/60
  PREVENTERS
     GAS DISTRIBUTION ILLUMINATING ..48/193+
     PIPE JOINT .....................285/171+
  STOPPERS
     COMPOSITION ....................252/72
     COMPOSITION COATING OR PLASTIC .106/33
     SHIP ...........................114/227+

LEAKAGE
  DISPOSAL
     PIPE JOINT .....................285/13
  ELECTRIC CURRENT TESTING ..........324/500+

LEARNERS INSTRUMENTS
  GOLF ..............................273/35.R+
  TELEGRAPHY ........................178/115

LEASH
  ANIMAL ............................119/795
     DESIGN, DOG ....................D30/153
  COLLARS ...........................119/792+
     DESIGN .........................D30/152
     DESIGN, DOG ....................D30/152

LEASING
  LOOMS .............................139/98
     STOPPING .......................139/350
  WARP BEAM .........................28/198+