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002 - Apparel (963)004 - Baths, closets, sinks, and spittoons (607)
005 - Beds (682)
007 - Compound tools (65)
008 - Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers (358)
012 - Boot and shoe making (15)
014 - Bridges (61)
015 - Brushing, scrubbing, and general cleaning (1075)
016 - Miscellaneous hardware (e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.) (491)
019 - Textiles: fiber preparation (45)
023 - Chemistry: physical processes (12)
024 - Buckles, buttons, clasps, etc. (579)
026 - Textiles: cloth finishing (7)
027 - Undertaking (27)
028 - Textiles: manufacturing (34)
029 - Metal working (1618)
030 - Cutlery (583)
033 - Geometrical instruments (453)
034 - Drying and gas or vapor contact with solids (364)
036 - Boots, shoes, and leggings (534)
037 - Excavating (166)
038 - Textiles: ironing or smoothing (42)
040 - Card, picture, or sign exhibiting (553)
042 - Firearms (190)
043 - Fishing, trapping, and vermin destroying (362)
044 - Fuel and related compositions (304)
047 - Plant husbandry (339)
048 - Gas: heating and illuminating (205)
049 - Movable or removable closures (447)
051 - Abrasive tool making process, material, or composition (98)
052 - Static structures (e.g., buildings) (1891)
053 - Package making (552)
054 - Harness for working animal (38)
055 - Gas separation (325)
056 - Harvesters (280)
057 - Textiles: spinning, twisting, and twining (52)
059 - Chain, staple, and horseshoe making (33)
060 - Power plants (2097)
062 - Refrigeration (1649)
063 - Jewelry (112)
065 - Glass manufacturing (267)
066 - Textiles: knitting (72)
068 - Textiles: fluid treating apparatus (242)
069 - Leather manufactures (4)
070 - Locks (525)
071 - Chemistry: fertilizers (82)
072 - Metal deforming (552)
073 - Measuring and testing (3174)
074 - Machine element or mechanism (1117)
075 - Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures (256)
076 - Metal tools and implements, making (26)
081 - Tools (452)
082 - Turning (54)
083 - Cutting (552)
084 - Music (577)
086 - Ammunition and explosive-charge making (24)
087 - Textiles: braiding, netting, and lace making (10)
089 - Ordnance (140)
091 - Motors: expansible chamber type (80)
092 - Expansible chamber devices (156)
095 - Gas separation: processes (443)
096 - Gas separation: apparatus (252)
099 - Foods and beverages: apparatus (494)
100 - Presses (104)
101 - Printing (574)
102 - Ammunition and explosives (171)
104 - Railways (92)
105 - Railway rolling stock (99)
106 - Compositions: coating or plastic (587)
108 - Horizontally supported planar surfaces (246)
109 - Safes, bank protection, or a related device (33)
110 - Furnaces (138)
111 - Planting (81)
112 - Sewing (143)
114 - Ships (372)
116 - Signals and indicators (143)
117 - Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor (171)
118 - Coating apparatus (618)
119 - Animal husbandry (720)
122 - Liquid heaters and vaporizers (137)
123 - Internal-combustion engines (2185)
124 - Mechanical guns and projectors (180)
125 - Stone working (44)
126 - Stoves and furnaces (515)
127 - Sugar, starch, and carbohydrates (33)
128 - Surgery (1200)
131 - Tobacco (190)
132 - Toilet (436)
134 - Cleaning and liquid contact with solids (996)
135 - Tent, canopy, umbrella, or cane (219)
136 - Batteries: thermoelectric and photoelectric (1224)
137 - Fluid handling (1056)
138 - Pipes and tubular conduits (241)
139 - Textiles: weaving (88)
140 - Wireworking (35)
141 - Fluent material handling, with receiver or receiver coacting means (324)
144 - Woodworking (155)
147 - Coopering (3)
148 - Metal treatment (514)
149 - Explosive and thermic compositions or charges (47)
150 - Purses, wallets, and protective covers (105)
152 - Resilient tires and wheels (486)
156 - Adhesive bonding and miscellaneous chemical manufacture (1789)
157 - Wheelwright machines (26)
159 - Concentrating evaporators (19)
160 - Flexible or portable closure, partition, or panel (339)
162 - Paper making and fiber liberation (434)
164 - Metal founding (270)
165 - Heat exchange (1191)
166 - Wells (1571)
168 - Farriery (17)
169 - Fire extinguishers (170)
171 - Unearthing plants or buried objects (3)
172 - Earth working (154)
173 - Tool driving or impacting (256)
174 - Electricity: conductors and insulators (1728)
175 - Boring or penetrating the earth (602)
177 - Weighing scales (113)
178 - Telegraphy (175)
180 - Motor vehicles (1058)
181 - Acoustics (283)
182 - Fire escape, ladder, or scaffold (250)
184 - Lubrication (146)
185 - Motors: spring, weight, or animal powered (11)
186 - Merchandising (11)
187 - Elevator, industrial lift truck, or stationary lift for vehicle (282)
188 - Brakes (594)
190 - Trunks and hand-carried luggage (82)
191 - Electricity: transmission to vehicles (21)
192 - Clutches and power-stop control (466)
193 - Conveyors, chutes, skids, guides, and ways (33)
194 - Check-actuated control mechanisms (93)
196 - Mineral oils: apparatus (2)
198 - Conveyors: power-driven (548)
200 - Electricity: circuit makers and breakers (664)
201 - Distillation: processes, thermolytic (31)
202 - Distillation: apparatus (55)
203 - Distillation: processes, separatory (81)
204 - Chemistry: electrical and wave energy (1154)
205 - Electrolysis: processes, compositions used therein, and methods of preparing the compositions (764)
206 - Special receptacle or package (1380)
208 - Mineral oils: processes and products (421)
209 - Classifying, separating, and assorting solids (337)
210 - Liquid purification or separation (2176)
211 - Supports: racks (474)
212 - Traversing hoists (99)
213 - Railway draft appliances (19)
215 - Bottles and jars (369)
216 - Etching a substrate: processes (504)
217 - Wooden receptacles (5)
218 - High-voltage switches with arc preventing or extinguishing devices (91)
219 - Electric heating (1373)
220 - Receptacles (1235)
221 - Article dispensing (313)
222 - Dispensing (799)
223 - Apparel apparatus (97)
224 - Package and article carriers (423)
225 - Severing by tearing or breaking (30)
226 - Advancing material of indeterminate length (53)
227 - Elongated-member-driving apparatus (427)
228 - Metal fusion bonding (360)
229 - Envelopes, wrappers, and paperboard boxes (260)
231 - Whips and whip apparatus (3)
232 - Deposit and collection receptacles (21)
234 - Selective cutting (e.g., punching) (2)
235 - Registers (1516)
236 - Automatic temperature and humidity regulation (119)
237 - Heating systems (66)
238 - Railways: surface track (43)
239 - Fluid sprinkling, spraying, and diffusing (908)
241 - Solid material comminution or disintegration (368)
242 - Winding, tensioning, or guiding (509)
244 - Aeronautics and astronautics (960)
245 - Wire fabrics and structure (1)
246 - Railway switches and signals (50)
248 - Supports (1530)
249 - Static molds (124)
250 - Radiant energy (3166)
251 - Valves and valve actuation (632)
252 - Compositions (1244)
254 - Implements or apparatus for applying pushing or pulling force (214)
256 - Fences (164)
257 - Active solid-state devices (e.g., transistors, solid-state diodes) (12375)
260 - Chemistry of carbon compounds (3)
261 - Gas and liquid contact apparatus (130)
264 - Plastic and nonmetallic article shaping or treating: processes (1704)
266 - Metallurgical apparatus (117)
267 - Spring devices (272)
269 - Work holders (235)
270 - Sheet-material associating (170)
271 - Sheet feeding or delivering (766)
273 - Amusement devices: games (540)
277 - Seal for a joint or juncture (521)
279 - Chucks or sockets (101)
280 - Land vehicles (2007)
281 - Books, strips, and leaves (79)
283 - Printed matter (170)
285 - Pipe joints or couplings (529)
289 - Knots and knot tying (4)
290 - Prime-mover dynamo plants (636)
291 - Track sanders (2)
292 - Closure fasteners (297)
293 - Vehicle fenders (126)
294 - Handling: hand and hoist-line implements (220)
295 - Railway wheels and axles (6)
296 - Land vehicles: bodies and tops (1334)
297 - Chairs and seats (1174)
298 - Land vehicles: dumping (29)
299 - Mining or in situ disintegration of hard material (85)
300 - Brush, broom, and mop making (11)
301 - Land vehicles: wheels and axles (195)
303 - Fluid-pressure and analogous brake systems (171)
305 - Wheel substitutes for land vehicles (65)
307 - Electrical transmission or interconnection systems (875)
310 - Electrical generator or motor structure (2044)
312 - Supports: cabinet structure (603)
313 - Electric lamp and discharge devices (2171)
315 - Electric lamp and discharge devices: systems (1405)
318 - Electricity: motive power systems (1031)
320 - Electricity: battery or capacitor charging or discharging (924)
322 - Electricity: single generator systems (102)
323 - Electricity: power supply or regulation systems (1007)
324 - Electricity: measuring and testing (2996)
326 - Electronic digital logic circuitry (621)
327 - Miscellaneous active electrical nonlinear devices, circuits, and systems (2300)
329 - Demodulators (27)
330 - Amplifiers (817)
331 - Oscillators (506)
332 - Modulators (81)
333 - Wave transmission lines and networks (771)
334 - Tuners (21)
335 - Electricity: magnetically operated switches, magnets, and electromagnets (358)
336 - Inductor devices (378)
337 - Electricity: electrothermally or thermally actuated switches (92)
338 - Electrical resistors (131)
340 - Communications: electrical (4510)
341 - Coded data generation or conversion (1046)
342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation) (1147)
343 - Communications: radio wave antennas (1519)
345 - Computer graphics processing and selective visual display systems (7234)
346 - Recorders (11)
347 - Incremental printing of symbolic information (2971)
348 - Television (5417)
349 - Liquid crystal cells, elements and systems (2676)
351 - Optics: eye examining, vision testing and correcting (600)
352 - Optics: motion pictures (16)
353 - Optics: image projectors (593)
355 - Photocopying (904)
356 - Optics: measuring and testing (2403)
358 - Facsimile and static presentation processing (3153)
359 - Optical: systems and elements (3841)
360 - Dynamic magnetic information storage or retrieval (1576)
361 - Electricity: electrical systems and devices (4282)
362 - Illumination (3280)
363 - Electric power conversion systems (790)
365 - Static information storage and retrieval (3514)
366 - Agitating (336)
367 - Communications, electrical: acoustic wave systems and devices (426)
368 - Horology: time measuring systems or devices (313)
369 - Dynamic information storage or retrieval (2019)
370 - Multiplex communications (9920)
372 - Coherent light generators (1067)
373 - Industrial electric heating furnaces (29)
374 - Thermal measuring and testing (395)
375 - Pulse or digital communications (5193)
376 - Induced nuclear reactions: processes, systems, and elements (238)
377 - Electrical pulse counters, pulse dividers, or shift registers: circuits and systems (81)
378 - X-ray or gamma ray systems or devices (1118)
379 - Telephonic communications (1546)
380 - Cryptography (1180)
381 - Electrical audio signal processing systems and devices (2030)
382 - Image analysis (5490)
383 - Flexible bags (289)
384 - Bearings (627)
385 - Optical waveguides (1605)
386 - Television signal processing for dynamic recording or reproducing (1080)
388 - Electricity: motor control systems (61)
392 - Electric resistance heating devices (150)
396 - Photography (520)
398 - Optical communications (1406)
399 - Electrophotography (2906)
400 - Typewriting machines (288)
401 - Coating implements with material supply (292)
402 - Binder device releasably engaging aperture or notch of sheet (58)
403 - Joints and connections (425)
404 - Road structure, process, or apparatus (252)
405 - Hydraulic and earth engineering (514)
406 - Conveyors: fluid current (55)
407 - Cutters, for shaping (174)
408 - Cutting by use of rotating axially moving tool (240)
409 - Gear cutting, milling, or planing (114)
410 - Freight accommodation on freight carrier (113)
411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener (391)
412 - Bookbinding: process and apparatus (69)
413 - Sheet metal container making (10)
414 - Material or article handling (997)
415 - Rotary kinetic fluid motors or pumps (915)
416 - Fluid reaction surfaces (i.e., impellers) (758)
417 - Pumps (975)
418 - Rotary expansible chamber devices (309)
419 - Powder metallurgy processes (120)
420 - Alloys or metallic compositions (339)
422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing (1462)
423 - Chemistry of inorganic compounds (1102)
424 - Drug, bio-affecting and body treating compositions (12341)
425 - Plastic article or earthenware shaping or treating: apparatus (566)
426 - Food or edible material: processes, compositions, and products (2323)
427 - Coating processes (2583)
428 - Stock material or miscellaneous articles (7057)
429 - Chemistry: electrical current producing apparatus, product, and process (3518)
430 - Radiation imagery chemistry: process, composition, or product thereof (2253)
431 - Combustion (281)
432 - Heating (88)
433 - Dentistry (803)
434 - Education and demonstration (725)
435 - Chemistry: molecular biology and microbiology (7517)
436 - Chemistry: analytical and immunological testing (902)
438 - Semiconductor device manufacturing: process (5361)
439 - Electrical connectors (2803)
440 - Marine propulsion (224)
441 - Buoys, rafts, and aquatic devices (127)
442 - Fabric (woven, knitted, or nonwoven textile or cloth, etc.) (440)
445 - Electric lamp or space discharge component or device manufacturing (186)
446 - Amusement devices: toys (399)
449 - Bee culture (3)
450 - Foundation garments (86)
451 - Abrading (755)
452 - Butchering (93)
453 - Coin handling (20)
454 - Ventilation (342)
455 - Telecommunications (8036)
460 - Crop threshing or separating (80)
463 - Amusement devices: games (2462)
464 - Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts (202)
470 - Threaded, headed fastener, or washer making: process and apparatus (20)
472 - Amusement devices (79)
473 - Games using tangible projectile (1249)
474 - Endless belt power transmission systems or components (360)
475 - Planetary gear transmission systems or components (628)
476 - Friction gear transmission systems or components (31)
477 - Interrelated power delivery controls, including engine control (448)
482 - Exercise devices (740)
483 - Tool changing (33)
492 - Roll or roller (39)
493 - Manufacturing container or tube from paper; or other manufacturing from a sheet or web (157)
494 - Imperforate bowl: centrifugal separators (59)
501 - Compositions: ceramic (305)
502 - Catalyst, solid sorbent, or support therefor: product or process of making (511)
503 - Record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor (71)
504 - Plant protecting and regulating compositions (418)
505 - Superconductor technology: apparatus, material, process (128)
506 - Combinatorial chemistry technology: method, library, apparatus (972)
507 - Earth boring, well treating, and oil field chemistry (247)
508 - Solid anti-friction devices, materials therefor, lubricant or separant compositions for moving solid surfaces, and miscellaneous mineral oil compositions (338)
510 - Cleaning compositions for solid surfaces, auxiliary compositions therefor, or processes of preparing the compositions (575)
512 - Perfume compositions (38)
514 - Drug, bio-affecting and body treating compositions (13037)
516 - Colloid systems and wetting agents; subcombinations thereof; processes of (66)
518 - Chemistry: fischer-tropsch processes; or purification or recovery of products thereof (105)
521 - Synthetic resins or natural rubbers -- part of the class 520 series (347)
522 - Synthetic resins or natural rubbers -- part of the class 520 series (181)
523 - Synthetic resins or natural rubbers -- part of the class 520 series (364)
524 - Synthetic resins or natural rubbers -- part of the class 520 series (1718)
525 - Synthetic resins or natural rubbers -- part of the class 520 series (861)
526 - Synthetic resins or natural rubbers -- part of the class 520 series (672)
527 - Synthetic resins or natural rubbers -- part of the class 520 series (25)
528 - Synthetic resins or natural rubbers -- part of the class 520 series (560)
530 - Chemistry: natural resins or derivatives; peptides or proteins; lignins or reaction products thereof (673)
534 - Organic compounds -- part of the class 532-570 series (46)
536 - Organic compounds -- part of the class 532-570 series (469)
540 - Organic compounds -- part of the class 532-570 series (174)
544 - Organic compounds -- part of the class 532-570 series (364)
546 - Organic compounds -- part of the class 532-570 series (402)
548 - Organic compounds -- part of the class 532-570 series (373)
549 - Organic compounds -- part of the class 532-570 series (317)
552 - Organic compounds -- part of the class 532-570 series (35)
554 - Organic compounds -- part of the class 532-570 series (81)
556 - Organic compounds -- part of the class 532-570 series (127)
558 - Organic compounds -- part of the class 532-570 series (131)
560 - Organic compounds -- part of the class 532-570 series (180)
562 - Organic compounds -- part of the class 532-570 series (205)
564 - Organic compounds -- part of the class 532-570 series (216)
568 - Organic compounds -- part of the class 532-570 series (338)
570 - Organic compounds -- part of the class 532-570 series (109)
585 - Chemistry of hydrocarbon compounds (398)
588 - Hazardous or toxic waste destruction or containment (92)
600 - Surgery (5461)
601 - Surgery: kinesitherapy (381)
602 - Surgery: splint, brace, or bandage (373)
604 - Surgery (3501)
606 - Surgery (4293)
607 - Surgery: light, thermal, and electrical application (1604)
623 - Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor (2249)
700 - Data processing: generic control systems or specific applications (2233)
701 - Data processing: vehicles, navigation, and relative location (4029)
702 - Data processing: measuring, calibrating, or testing (2661)
703 - Data processing: structural design, modeling, simulation, and emulation (1177)
704 - Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression (1799)
705 - Data processing: financial, business practice, management, or cost/price determination (9246)
706 - Data processing: artificial intelligence (952)
707 - Data processing: database and file management or data structures (7889)
708 - Electrical computers: arithmetic processing and calculating (457)
709 - Electrical computers and digital processing systems: multicomputer data transferring (5788)
710 - Electrical computers and digital data processing systems: input/output (1800)
711 - Electrical computers and digital processing systems: memory (3049)
712 - Electrical computers and digital processing systems: processing architectures and instruction processing (e.g., processors) (1091)
713 - Electrical computers and digital processing systems: support (2856)
714 - Error detection/correction and fault detection/recovery (2749)
715 - Data processing: presentation processing of document, operator interface processing, and screen saver display processing (3991)
716 - Data processing: design and analysis of circuit or semiconductor mask (1119)
717 - Data processing: software development, installation, and management (1843)
718 - Electrical computers and digital processing systems: virtual machine task or process management or task management/control (1195)
719 - Electrical computers and digital processing systems: interprogram communication or interprocess communication (ipc) (816)
720 - Dynamic optical information storage or retrieval (288)
725 - Interactive video distribution systems (2346)
726 - Information security (3022)
800 - Multicellular living organisms and unmodified parts thereof and related processes (1663)
850 - Scanning-probe techniques or apparatus; applications of scanning-probe techniques, e.g., scanning probe microscopy [spm] (47)
903 - Hybrid electric vehicles (hevs) (1)
PLT - Plants (149)