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002 - Apparel (933)004 - Baths, closets, sinks, and spittoons (595)
005 - Beds (668)
007 - Compound tools (60)
008 - Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers (351)
012 - Boot and shoe making (15)
014 - Bridges (59)
015 - Brushing, scrubbing, and general cleaning (1048)
016 - Miscellaneous hardware (e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.) (481)
019 - Textiles: fiber preparation (44)
023 - Chemistry: physical processes (12)
024 - Buckles, buttons, clasps, etc. (564)
026 - Textiles: cloth finishing (7)
027 - Undertaking (24)
028 - Textiles: manufacturing (32)
029 - Metal working (1571)
030 - Cutlery (569)
033 - Geometrical instruments (442)
034 - Drying and gas or vapor contact with solids (350)
036 - Boots, shoes, and leggings (518)
037 - Excavating (156)
038 - Textiles: ironing or smoothing (40)
040 - Card, picture, or sign exhibiting (536)
042 - Firearms (181)
043 - Fishing, trapping, and vermin destroying (348)
044 - Fuel and related compositions (296)
047 - Plant husbandry (326)
048 - Gas: heating and illuminating (201)
049 - Movable or removable closures (434)
051 - Abrasive tool making process, material, or composition (97)
052 - Static structures (e.g., buildings) (1827)
053 - Package making (531)
054 - Harness for working animal (36)
055 - Gas separation (321)
056 - Harvesters (264)
057 - Textiles: spinning, twisting, and twining (50)
059 - Chain, staple, and horseshoe making (32)
060 - Power plants (2028)
062 - Refrigeration (1585)
063 - Jewelry (108)
065 - Glass manufacturing (257)
066 - Textiles: knitting (71)
068 - Textiles: fluid treating apparatus (241)
069 - Leather manufactures (4)
070 - Locks (506)
071 - Chemistry: fertilizers (81)
072 - Metal deforming (543)
073 - Measuring and testing (3083)
074 - Machine element or mechanism (1092)
075 - Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures (248)
076 - Metal tools and implements, making (26)
081 - Tools (439)
082 - Turning (52)
083 - Cutting (545)
084 - Music (564)
086 - Ammunition and explosive-charge making (24)
087 - Textiles: braiding, netting, and lace making (10)
089 - Ordnance (137)
091 - Motors: expansible chamber type (80)
092 - Expansible chamber devices (153)
095 - Gas separation: processes (430)
096 - Gas separation: apparatus (241)
099 - Foods and beverages: apparatus (481)
100 - Presses (102)
101 - Printing (553)
102 - Ammunition and explosives (167)
104 - Railways (89)
105 - Railway rolling stock (99)
106 - Compositions: coating or plastic (575)
108 - Horizontally supported planar surfaces (239)
109 - Safes, bank protection, or a related device (32)
110 - Furnaces (136)
111 - Planting (80)
112 - Sewing (140)
114 - Ships (364)
116 - Signals and indicators (138)
117 - Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor (167)
118 - Coating apparatus (592)
119 - Animal husbandry (698)
122 - Liquid heaters and vaporizers (135)
123 - Internal-combustion engines (2126)
124 - Mechanical guns and projectors (171)
125 - Stone working (43)
126 - Stoves and furnaces (504)
127 - Sugar, starch, and carbohydrates (32)
128 - Surgery (1172)
131 - Tobacco (185)
132 - Toilet (428)
134 - Cleaning and liquid contact with solids (970)
135 - Tent, canopy, umbrella, or cane (213)
136 - Batteries: thermoelectric and photoelectric (1185)
137 - Fluid handling (1017)
138 - Pipes and tubular conduits (237)
139 - Textiles: weaving (85)
140 - Wireworking (28)
141 - Fluent material handling, with receiver or receiver coacting means (312)
144 - Woodworking (152)
147 - Coopering (3)
148 - Metal treatment (502)
149 - Explosive and thermic compositions or charges (47)
150 - Purses, wallets, and protective covers (102)
152 - Resilient tires and wheels (464)
156 - Adhesive bonding and miscellaneous chemical manufacture (1732)
157 - Wheelwright machines (25)
159 - Concentrating evaporators (19)
160 - Flexible or portable closure, partition, or panel (328)
162 - Paper making and fiber liberation (422)
164 - Metal founding (264)
165 - Heat exchange (1157)
166 - Wells (1514)
168 - Farriery (17)
169 - Fire extinguishers (166)
171 - Unearthing plants or buried objects (3)
172 - Earth working (153)
173 - Tool driving or impacting (247)
174 - Electricity: conductors and insulators (1668)
175 - Boring or penetrating the earth (581)
177 - Weighing scales (110)
178 - Telegraphy (165)
180 - Motor vehicles (1033)
181 - Acoustics (272)
182 - Fire escape, ladder, or scaffold (243)
184 - Lubrication (142)
185 - Motors: spring, weight, or animal powered (11)
186 - Merchandising (11)
187 - Elevator, industrial lift truck, or stationary lift for vehicle (275)
188 - Brakes (578)
190 - Trunks and hand-carried luggage (81)
191 - Electricity: transmission to vehicles (21)
192 - Clutches and power-stop control (451)
193 - Conveyors, chutes, skids, guides, and ways (33)
194 - Check-actuated control mechanisms (92)
196 - Mineral oils: apparatus (2)
198 - Conveyors: power-driven (529)
200 - Electricity: circuit makers and breakers (648)
201 - Distillation: processes, thermolytic (30)
202 - Distillation: apparatus (51)
203 - Distillation: processes, separatory (80)
204 - Chemistry: electrical and wave energy (1121)
205 - Electrolysis: processes, compositions used therein, and methods of preparing the compositions (733)
206 - Special receptacle or package (1355)
208 - Mineral oils: processes and products (410)
209 - Classifying, separating, and assorting solids (331)
210 - Liquid purification or separation (2116)
211 - Supports: racks (464)
212 - Traversing hoists (96)
213 - Railway draft appliances (19)
215 - Bottles and jars (356)
216 - Etching a substrate: processes (490)
217 - Wooden receptacles (5)
218 - High-voltage switches with arc preventing or extinguishing devices (90)
219 - Electric heating (1330)
220 - Receptacles (1199)
221 - Article dispensing (304)
222 - Dispensing (775)
223 - Apparel apparatus (94)
224 - Package and article carriers (409)
225 - Severing by tearing or breaking (28)
226 - Advancing material of indeterminate length (52)
227 - Elongated-member-driving apparatus (417)
228 - Metal fusion bonding (351)
229 - Envelopes, wrappers, and paperboard boxes (251)
231 - Whips and whip apparatus (3)
232 - Deposit and collection receptacles (21)
234 - Selective cutting (e.g., punching) (2)
235 - Registers (1481)
236 - Automatic temperature and humidity regulation (118)
237 - Heating systems (64)
238 - Railways: surface track (43)
239 - Fluid sprinkling, spraying, and diffusing (886)
241 - Solid material comminution or disintegration (363)
242 - Winding, tensioning, or guiding (495)
244 - Aeronautics and astronautics (933)
245 - Wire fabrics and structure (1)
246 - Railway switches and signals (48)
248 - Supports (1488)
249 - Static molds (121)
250 - Radiant energy (3086)
251 - Valves and valve actuation (619)
252 - Compositions (1200)
254 - Implements or apparatus for applying pushing or pulling force (206)
256 - Fences (157)
257 - Active solid-state devices (e.g., transistors, solid-state diodes) (12028)
260 - Chemistry of carbon compounds (3)
261 - Gas and liquid contact apparatus (128)
264 - Plastic and nonmetallic article shaping or treating: processes (1665)
266 - Metallurgical apparatus (116)
267 - Spring devices (263)
269 - Work holders (223)
270 - Sheet-material associating (169)
271 - Sheet feeding or delivering (743)
273 - Amusement devices: games (525)
277 - Seal for a joint or juncture (514)
279 - Chucks or sockets (97)
280 - Land vehicles (1964)
281 - Books, strips, and leaves (76)
283 - Printed matter (168)
285 - Pipe joints or couplings (518)
289 - Knots and knot tying (4)
290 - Prime-mover dynamo plants (611)
291 - Track sanders (2)
292 - Closure fasteners (291)
293 - Vehicle fenders (123)
294 - Handling: hand and hoist-line implements (212)
295 - Railway wheels and axles (6)
296 - Land vehicles: bodies and tops (1300)
297 - Chairs and seats (1147)
298 - Land vehicles: dumping (29)
299 - Mining or in situ disintegration of hard material (83)
300 - Brush, broom, and mop making (11)
301 - Land vehicles: wheels and axles (189)
303 - Fluid-pressure and analogous brake systems (170)
305 - Wheel substitutes for land vehicles (63)
307 - Electrical transmission or interconnection systems (853)
310 - Electrical generator or motor structure (2009)
312 - Supports: cabinet structure (585)
313 - Electric lamp and discharge devices (2108)
315 - Electric lamp and discharge devices: systems (1349)
318 - Electricity: motive power systems (998)
320 - Electricity: battery or capacitor charging or discharging (885)
322 - Electricity: single generator systems (99)
323 - Electricity: power supply or regulation systems (981)
324 - Electricity: measuring and testing (2923)
326 - Electronic digital logic circuitry (609)
327 - Miscellaneous active electrical nonlinear devices, circuits, and systems (2247)
329 - Demodulators (26)
330 - Amplifiers (797)
331 - Oscillators (492)
332 - Modulators (79)
333 - Wave transmission lines and networks (748)
334 - Tuners (21)
335 - Electricity: magnetically operated switches, magnets, and electromagnets (344)
336 - Inductor devices (365)
337 - Electricity: electrothermally or thermally actuated switches (92)
338 - Electrical resistors (130)
340 - Communications: electrical (4398)
341 - Coded data generation or conversion (1025)
342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation) (1114)
343 - Communications: radio wave antennas (1476)
345 - Computer graphics processing and selective visual display systems (7011)
346 - Recorders (11)
347 - Incremental printing of symbolic information (2910)
348 - Television (5234)
349 - Liquid crystal cells, elements and systems (2593)
351 - Optics: eye examining, vision testing and correcting (589)
352 - Optics: motion pictures (16)
353 - Optics: image projectors (587)
355 - Photocopying (876)
356 - Optics: measuring and testing (2334)
358 - Facsimile and static presentation processing (3057)
359 - Optical: systems and elements (3752)
360 - Dynamic magnetic information storage or retrieval (1541)
361 - Electricity: electrical systems and devices (4146)
362 - Illumination (3190)
363 - Electric power conversion systems (759)
365 - Static information storage and retrieval (3432)
366 - Agitating (330)
367 - Communications, electrical: acoustic wave systems and devices (412)
368 - Horology: time measuring systems or devices (310)
369 - Dynamic information storage or retrieval (1966)
370 - Multiplex communications (9607)
372 - Coherent light generators (1046)
373 - Industrial electric heating furnaces (29)
374 - Thermal measuring and testing (384)
375 - Pulse or digital communications (5041)
376 - Induced nuclear reactions: processes, systems, and elements (229)
377 - Electrical pulse counters, pulse dividers, or shift registers: circuits and systems (79)
378 - X-ray or gamma ray systems or devices (1090)
379 - Telephonic communications (1513)
380 - Cryptography (1144)
381 - Electrical audio signal processing systems and devices (1963)
382 - Image analysis (5347)
383 - Flexible bags (282)
384 - Bearings (609)
385 - Optical waveguides (1566)
386 - Television signal processing for dynamic recording or reproducing (1017)
388 - Electricity: motor control systems (61)
392 - Electric resistance heating devices (144)
396 - Photography (513)
398 - Optical communications (1375)
399 - Electrophotography (2849)
400 - Typewriting machines (281)
401 - Coating implements with material supply (283)
402 - Binder device releasably engaging aperture or notch of sheet (56)
403 - Joints and connections (413)
404 - Road structure, process, or apparatus (244)
405 - Hydraulic and earth engineering (495)
406 - Conveyors: fluid current (53)
407 - Cutters, for shaping (169)
408 - Cutting by use of rotating axially moving tool (230)
409 - Gear cutting, milling, or planing (111)
410 - Freight accommodation on freight carrier (109)
411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener (377)
412 - Bookbinding: process and apparatus (67)
413 - Sheet metal container making (10)
414 - Material or article handling (972)
415 - Rotary kinetic fluid motors or pumps (894)
416 - Fluid reaction surfaces (i.e., impellers) (740)
417 - Pumps (958)
418 - Rotary expansible chamber devices (300)
419 - Powder metallurgy processes (118)
420 - Alloys or metallic compositions (330)
422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing (1430)
423 - Chemistry of inorganic compounds (1075)
424 - Drug, bio-affecting and body treating compositions (12018)
425 - Plastic article or earthenware shaping or treating: apparatus (553)
426 - Food or edible material: processes, compositions, and products (2255)
427 - Coating processes (2506)
428 - Stock material or miscellaneous articles (6876)
429 - Chemistry: electrical current producing apparatus, product, and process (3404)
430 - Radiation imagery chemistry: process, composition, or product thereof (2202)
431 - Combustion (270)
432 - Heating (86)
433 - Dentistry (783)
434 - Education and demonstration (700)
435 - Chemistry: molecular biology and microbiology (7314)
436 - Chemistry: analytical and immunological testing (886)
438 - Semiconductor device manufacturing: process (5206)
439 - Electrical connectors (2733)
440 - Marine propulsion (222)
441 - Buoys, rafts, and aquatic devices (121)
442 - Fabric (woven, knitted, or nonwoven textile or cloth, etc.) (425)
445 - Electric lamp or space discharge component or device manufacturing (179)
446 - Amusement devices: toys (390)
449 - Bee culture (3)
450 - Foundation garments (84)
451 - Abrading (736)
452 - Butchering (92)
453 - Coin handling (19)
454 - Ventilation (334)
455 - Telecommunications (7782)
460 - Crop threshing or separating (77)
463 - Amusement devices: games (2403)
464 - Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts (199)
470 - Threaded, headed fastener, or washer making: process and apparatus (19)
472 - Amusement devices (77)
473 - Games using tangible projectile (1206)
474 - Endless belt power transmission systems or components (345)
475 - Planetary gear transmission systems or components (617)
476 - Friction gear transmission systems or components (28)
477 - Interrelated power delivery controls, including engine control (433)
482 - Exercise devices (720)
483 - Tool changing (31)
492 - Roll or roller (38)
493 - Manufacturing container or tube from paper; or other manufacturing from a sheet or web (155)
494 - Imperforate bowl: centrifugal separators (58)
501 - Compositions: ceramic (298)
502 - Catalyst, solid sorbent, or support therefor: product or process of making (496)
503 - Record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor (70)
504 - Plant protecting and regulating compositions (407)
505 - Superconductor technology: apparatus, material, process (122)
506 - Combinatorial chemistry technology: method, library, apparatus (953)
507 - Earth boring, well treating, and oil field chemistry (234)
508 - Solid anti-friction devices, materials therefor, lubricant or separant compositions for moving solid surfaces, and miscellaneous mineral oil compositions (333)
510 - Cleaning compositions for solid surfaces, auxiliary compositions therefor, or processes of preparing the compositions (559)
512 - Perfume compositions (38)
514 - Drug, bio-affecting and body treating compositions (12694)
516 - Colloid systems and wetting agents; subcombinations thereof; processes of (64)
518 - Chemistry: fischer-tropsch processes; or purification or recovery of products thereof (103)
521 - Synthetic resins or natural rubbers -- part of the class 520 series (333)
522 - Synthetic resins or natural rubbers -- part of the class 520 series (177)
523 - Synthetic resins or natural rubbers -- part of the class 520 series (360)
524 - Synthetic resins or natural rubbers -- part of the class 520 series (1656)
525 - Synthetic resins or natural rubbers -- part of the class 520 series (840)
526 - Synthetic resins or natural rubbers -- part of the class 520 series (656)
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 (542)
530 - Chemistry: natural resins or derivatives; peptides or proteins; lignins or reaction products thereof (646)
534 - Organic compounds -- part of the class 532-570 series (43)
536 - Organic compounds -- part of the class 532-570 series (452)
540 - Organic compounds -- part of the class 532-570 series (169)
544 - Organic compounds -- part of the class 532-570 series (347)
546 - Organic compounds -- part of the class 532-570 series (390)
548 - Organic compounds -- part of the class 532-570 series (359)
549 - Organic compounds -- part of the class 532-570 series (297)
552 - Organic compounds -- part of the class 532-570 series (34)
554 - Organic compounds -- part of the class 532-570 series (80)
556 - Organic compounds -- part of the class 532-570 series (122)
558 - Organic compounds -- part of the class 532-570 series (126)
560 - Organic compounds -- part of the class 532-570 series (173)
562 - Organic compounds -- part of the class 532-570 series (197)
564 - Organic compounds -- part of the class 532-570 series (211)
568 - Organic compounds -- part of the class 532-570 series (333)
570 - Organic compounds -- part of the class 532-570 series (106)
585 - Chemistry of hydrocarbon compounds (386)
588 - Hazardous or toxic waste destruction or containment (91)
600 - Surgery (5277)
601 - Surgery: kinesitherapy (375)
602 - Surgery: splint, brace, or bandage (358)
604 - Surgery (3386)
606 - Surgery (4167)
607 - Surgery: light, thermal, and electrical application (1554)
623 - Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor (2190)
700 - Data processing: generic control systems or specific applications (2146)
701 - Data processing: vehicles, navigation, and relative location (3926)
702 - Data processing: measuring, calibrating, or testing (2577)
703 - Data processing: structural design, modeling, simulation, and emulation (1153)
704 - Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression (1740)
705 - Data processing: financial, business practice, management, or cost/price determination (9020)
706 - Data processing: artificial intelligence (919)
707 - Data processing: database and file management or data structures (7660)
708 - Electrical computers: arithmetic processing and calculating (452)
709 - Electrical computers and digital processing systems: multicomputer data transferring (5618)
710 - Electrical computers and digital data processing systems: input/output (1764)
711 - Electrical computers and digital processing systems: memory (2987)
712 - Electrical computers and digital processing systems: processing architectures and instruction processing (e.g., processors) (1068)
713 - Electrical computers and digital processing systems: support (2766)
714 - Error detection/correction and fault detection/recovery (2670)
715 - Data processing: presentation processing of document, operator interface processing, and screen saver display processing (3883)
716 - Data processing: design and analysis of circuit or semiconductor mask (1093)
717 - Data processing: software development, installation, and management (1801)
718 - Electrical computers and digital processing systems: virtual machine task or process management or task management/control (1164)
719 - Electrical computers and digital processing systems: interprogram communication or interprocess communication (ipc) (803)
720 - Dynamic optical information storage or retrieval (281)
725 - Interactive video distribution systems (2293)
726 - Information security (2941)
800 - Multicellular living organisms and unmodified parts thereof and related processes (1512)
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)