List of US Classifications

List of U.S. Classifications for Patents (United States Patent Classification (USPC) System)
	Class Number and Title		Class Number and Title
2	Apparel	330	Amplifiers
4	Baths, closets, sinks, and spittoons	331	Oscillators
5	Beds	332	Modulators
7	Compound tools	333	Wave transmission lines and networks
8	Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers	334	Tuners
12	Boot and shoe making	335	Electricity: magnetically operated switches, magnets, and electromagnets
14	Bridges	336	Inductor devices
15	Brushing, scrubbing, and general cleaning	337	Electricity: electrothermally or thermally actuated switches
16	Miscellaneous hardware (e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.)	338	Electrical resistors
19	Textiles: fiber preparation	340	Communications: electrical
23	Chemistry: physical processes	341	Coded data generation or conversion
24	Buckles, buttons, clasps, etc.	342	Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
26	Textiles: cloth finishing	343	Communications: radio wave antennas
27	Undertaking	345	Computer graphics processing and selective visual display systems
28	Textiles: manufacturing	346	Recorders
29	Metal working	347	Incremental printing of symbolic information
30	Cutlery	348	Television
33	Geometrical instruments	349	Liquid crystal cells, elements and systems
34	Drying and gas or vapor contact with solids	351	Optics: eye examining, vision testing and correcting
36	Boots, shoes, and leggings	352	Optics: motion pictures
37	Excavating	353	Optics: image projectors
38	Textiles: ironing or smoothing	355	Photocopying
40	Card, picture, or sign exhibiting	356	Optics: measuring and testing
42	Firearms	358	Facsimile and static presentation processing
43	Fishing, trapping, and vermin destroying	359	Optical: systems and elements
44	Fuel and related compositions	360	Dynamic magnetic information storage or retrieval
47	Plant husbandry	361	Electricity: electrical systems and devices
48	Gas: heating and illuminating	362	Illumination
49	Movable or removable closures	363	Electric power conversion systems
51	Abrasive tool making process, material, or composition	365	Static information storage and retrieval
52	Static structures (e.g., buildings)	366	Agitating
53	Package making	367	Communications, electrical: acoustic wave systems and devices
54	Harness for working animal	368	Horology: time measuring systems or devices
55	Gas separation	369	Dynamic information storage or retrieval
56	Harvesters	370	Multiplex communications
57	Textiles: spinning, twisting, and twining	372	Coherent light generators
59	Chain, staple, and horseshoe making	373	Industrial electric heating furnaces
60	Power plants	374	Thermal measuring and testing
62	Refrigeration	375	Pulse or digital communications
63	Jewelry	376	Induced nuclear reactions: processes, systems, and elements
65	Glass manufacturing	377	Electrical pulse counters, pulse dividers, or shift registers: circuits and systems
66	Textiles: knitting	378	X-ray or gamma ray systems or devices
68	Textiles: fluid treating apparatus	379	Telephonic communications
69	Leather manufactures	380	Cryptography
70	Locks	381	Electrical audio signal processing systems and devices
71	Chemistry: fertilizers	382	Image analysis
72	Metal deforming	383	Flexible bags
73	Measuring and testing	384	Bearings
74	Machine element or mechanism	385	Optical waveguides
75	Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures	386	Television signal processing for dynamic recording or reproducing
76	Metal tools and implements, making	388	Electricity: motor control systems
79	Button making	392	Electric resistance heating devices
81	Tools	396	Photography
82	Turning	398	Optical communications
83	Cutting	399	Electrophotography
84	Music	400	Typewriting machines
86	Ammunition and explosive-charge making	401	Coating implements with material supply
87	Textiles: braiding, netting, and lace making	402	Binder device releasably engaging aperture or notch of sheet
89	Ordnance	403	Joints and connections
91	Motors: expansible chamber type	404	Road structure, process, or apparatus
92	Expansible chamber devices	405	Hydraulic and earth engineering
95	Gas separation: processes	406	Conveyors: fluid current
96	Gas separation: apparatus	407	Cutters, for shaping
99	Foods and beverages: apparatus	408	Cutting by use of rotating axially moving tool
100	Presses	409	Gear cutting, milling, or planing
101	Printing	410	Freight accommodation on freight carrier
102	Ammunition and explosives	411	Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
104	Railways	412	Bookbinding: process and apparatus
105	Railway rolling stock	413	Sheet metal container making
106	Compositions: coating or plastic	414	Material or article handling
108	Horizontally supported planar surfaces	415	Rotary kinetic fluid motors or pumps
109	Safes, bank protection, or a related device	416	Fluid reaction surfaces (i.e., impellers)
110	Furnaces	417	Pumps
111	Planting	418	Rotary expansible chamber devices
112	Sewing	419	Powder metallurgy processes
114	Ships	420	Alloys or metallic compositions
116	Signals and indicators	422	Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing
117	Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor	423	Chemistry of inorganic compounds
118	Coating apparatus	424	Drug, bio-affecting and body treating compositions
119	Animal husbandry	425	Plastic article or earthenware shaping or treating: apparatus
122	Liquid heaters and vaporizers	426	Food or edible material: processes, compositions, and products
123	Internal-combustion engines	427	Coating processes
124	Mechanical guns and projectors	428	Stock material or miscellaneous articles
125	Stone working	429	Chemistry: electrical current producing apparatus, product, and process
126	Stoves and furnaces	430	Radiation imagery chemistry: process, composition, or product thereof
127	Sugar, starch, and carbohydrates	431	Combustion
128	Surgery	432	Heating
131	Tobacco	433	Dentistry
132	Toilet	434	Education and demonstration
134	Cleaning and liquid contact with solids	435	Chemistry: molecular biology and microbiology
135	Tent, canopy, umbrella, or cane	436	Chemistry: analytical and immunological testing
136	Batteries: thermoelectric and photoelectric	438	Semiconductor device manufacturing: process
137	Fluid handling	439	Electrical connectors
138	Pipes and tubular conduits	440	Marine propulsion
139	Textiles: weaving	441	Buoys, rafts, and aquatic devices
140	Wireworking	442	Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
141	Fluent material handling, with receiver or receiver coacting means	445	Electric lamp or space discharge component or device manufacturing
142	Wood turning	446	Amusement devices: toys
144	Woodworking	449	Bee culture
147	Coopering	450	Foundation garments
148	Metal treatment	451	Abrading
149	Explosive and thermic compositions or charges	452	Butchering
150	Purses, wallets, and protective covers	453	Coin handling
152	Resilient tires and wheels	454	Ventilation
156	Adhesive bonding and miscellaneous chemical manufacture	455	Telecommunications
157	Wheelwright machines	460	Crop threshing or separating
159	Concentrating evaporators	462	Books, strips, and leaves for manifolding
160	Flexible or portable closure, partition, or panel	463	Amusement devices: games
162	Paper making and fiber liberation	464	Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
163	Needle and pin making	470	Threaded, headed fastener, or washer making: process and apparatus
164	Metal founding	472	Amusement devices
165	Heat exchange	473	Games using tangible projectile
166	Wells	474	Endless belt power transmission systems or components
168	Farriery	475	Planetary gear transmission systems or components
169	Fire extinguishers	476	Friction gear transmission systems or components
171	Unearthing plants or buried objects	477	Interrelated power delivery controls, including engine control
172	Earth working	482	Exercise devices
173	Tool driving or impacting	483	Tool changing
174	Electricity: conductors and insulators	492	Roll or roller
175	Boring or penetrating the earth	493	Manufacturing container or tube from paper; or other manufacturing from a sheet or web
177	Weighing scales	494	Imperforate bowl: centrifugal separators
178	Telegraphy	501	Compositions: ceramic
180	Motor vehicles	502	Catalyst, solid sorbent, or support therefor: product or process of making
181	Acoustics	503	Record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor
182	Fire escape, ladder, or scaffold	504	Plant protecting and regulating compositions
184	Lubrication	505	Superconductor technology: apparatus, material, process
185	Motors: spring, weight, or animal powered	506	Combinatorial chemistry technology: method, library, apparatus
186	Merchandising	507	Earth boring, well treating, and oil field chemistry
187	Elevator, industrial lift truck, or stationary lift for vehicle	508	Solid anti-friction devices, materials therefor, lubricant or separant compositions for moving solid surfaces, and miscellaneous mineral oil compositions
188	Brakes	510	Cleaning compositions for solid surfaces, auxiliary compositions therefor, or processes of preparing the compositions
190	Trunks and hand-carried luggage	512	Perfume compositions
191	Electricity: transmission to vehicles	514	Drug, bio-affecting and body treating compositions
192	Clutches and power-stop control	516	Colloid systems and wetting agents; subcombinations thereof; processes of
193	Conveyors, chutes, skids, guides, and ways	518	Chemistry: fischer-tropsch processes; or purification or recovery of products thereof
194	Check-actuated control mechanisms	520	Synthetic resins or natural rubbers -- part of the class 520 series
196	Mineral oils: apparatus	521	Synthetic resins or natural rubbers -- part of the class 520 series
198	Conveyors: power-driven	522	Synthetic resins or natural rubbers -- part of the class 520 series
199	Type casting	523	Synthetic resins or natural rubbers -- part of the class 520 series
200	Electricity: circuit makers and breakers	524	Synthetic resins or natural rubbers -- part of the class 520 series
201	Distillation: processes, thermolytic	525	Synthetic resins or natural rubbers -- part of the class 520 series
202	Distillation: apparatus	526	Synthetic resins or natural rubbers -- part of the class 520 series
203	Distillation: processes, separatory	527	Synthetic resins or natural rubbers -- part of the class 520 series
204	Chemistry: electrical and wave energy	528	Synthetic resins or natural rubbers -- part of the class 520 series
205	Electrolysis: processes, compositions used therein, and methods of preparing the compositions	530	Chemistry: natural resins or derivatives; peptides or proteins; lignins or reaction products thereof
206	Special receptacle or package	532	Organic compounds -- part of the class 532-570 series
208	Mineral oils: processes and products	534	Organic compounds -- part of the class 532-570 series
209	Classifying, separating, and assorting solids	536	Organic compounds -- part of the class 532-570 series
210	Liquid purification or separation	540	Organic compounds -- part of the class 532-570 series
211	Supports: racks	544	Organic compounds -- part of the class 532-570 series
212	Traversing hoists	546	Organic compounds -- part of the class 532-570 series
213	Railway draft appliances	548	Organic compounds -- part of the class 532-570 series
215	Bottles and jars	549	Organic compounds -- part of the class 532-570 series
216	Etching a substrate: processes	552	Organic compounds -- part of the class 532-570 series
217	Wooden receptacles	554	Organic compounds -- part of the class 532-570 series
218	High-voltage switches with arc preventing or extinguishing devices	556	Organic compounds -- part of the class 532-570 series
219	Electric heating	558	Organic compounds -- part of the class 532-570 series
220	Receptacles	560	Organic compounds -- part of the class 532-570 series
221	Article dispensing	562	Organic compounds -- part of the class 532-570 series
222	Dispensing	564	Organic compounds -- part of the class 532-570 series
223	Apparel apparatus	568	Organic compounds -- part of the class 532-570 series
224	Package and article carriers	570	Organic compounds -- part of the class 532-570 series
225	Severing by tearing or breaking	585	Chemistry of hydrocarbon compounds
226	Advancing material of indeterminate length	588	Hazardous or toxic waste destruction or containment
227	Elongated-member-driving apparatus	600	Surgery
228	Metal fusion bonding	601	Surgery: kinesitherapy
229	Envelopes, wrappers, and paperboard boxes	602	Surgery: splint, brace, or bandage
231	Whips and whip apparatus	604	Surgery
232	Deposit and collection receptacles	606	Surgery
234	Selective cutting (e.g., punching)	607	Surgery: light, thermal, and electrical application
235	Registers	623	Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor
236	Automatic temperature and humidity regulation	700	Data processing: generic control systems or specific applications
237	Heating systems	701	Data processing: vehicles, navigation, and relative location
238	Railways: surface track	702	Data processing: measuring, calibrating, or testing
239	Fluid sprinkling, spraying, and diffusing	703	Data processing: structural design, modeling, simulation, and emulation
241	Solid material comminution or disintegration	704	Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression
242	Winding, tensioning, or guiding	705	Data processing: financial, business practice, management, or cost/price determination
244	Aeronautics and astronautics	706	Data processing: artificial intelligence
245	Wire fabrics and structure	707	Data processing: database and file management or data structures
246	Railway switches and signals	708	Electrical computers: arithmetic processing and calculating
248	Supports	709	Electrical computers and digital processing systems: multicomputer data transferring
249	Static molds	710	Electrical computers and digital data processing systems: input/output
250	Radiant energy	711	Electrical computers and digital processing systems: memory
251	Valves and valve actuation	712	Electrical computers and digital processing systems: processing architectures and instruction processing (e.g., processors)
252	Compositions	713	Electrical computers and digital processing systems: support
254	Implements or apparatus for applying pushing or pulling force	714	Error detection/correction and fault detection/recovery
256	Fences	715	Data processing: presentation processing of document, operator interface processing, and screen saver display processing
257	Active solid-state devices (e.g., transistors, solid-state diodes)	716	Data processing: design and analysis of circuit or semiconductor mask
258	Railway mail delivery	717	Data processing: software development, installation, and management
260	Chemistry of carbon compounds	718	Electrical computers and digital processing systems: virtual machine task or process management or task management/control
261	Gas and liquid contact apparatus	719	Electrical computers and digital processing systems: interprogram communication or interprocess communication (ipc)
264	Plastic and nonmetallic article shaping or treating: processes	720	Dynamic optical information storage or retrieval
266	Metallurgical apparatus	725	Interactive video distribution systems
267	Spring devices	726	Information security
269	Work holders	800	Multicellular living organisms and unmodified parts thereof and related processes
270	Sheet-material associating	850	Scanning-probe techniques or apparatus; applications of scanning-probe techniques, e.g., scanning probe microscopy [spm]
271	Sheet feeding or delivering	901	Robots
273	Amusement devices: games	902	Electronic funds transfer
276	Typesetting	903	Hybrid electric vehicles (hevs)
277	Seal for a joint or juncture	930	Peptide or protein sequence
278	Land vehicles: animal draft appliances	968	Horology
279	Chucks or sockets	976	Nuclear technology
280	Land vehicles	977	Nanotechnology
281	Books, strips, and leaves	984	Musical instruments
283	Printed matter	987	Organic compounds containing a bi, sb, as, or p atom or containing a metal atom of the 6th to 8th group of the periodic system
285	Pipe joints or couplings	D01	Edible products
289	Knots and knot tying	D02	Apparel and haberdashery
290	Prime-mover dynamo plants	D03	Travel goods and personal belongings
291	Track sanders	D04	Brushware
292	Closure fasteners	D05	Textile or paper yard goods; sheet material
293	Vehicle fenders	D06	Furnishings
294	Handling: hand and hoist-line implements	D07	Equipment for preparing or serving food or drink not elsewhere specified
295	Railway wheels and axles	D08	Tools and hardware
296	Land vehicles: bodies and tops	D09	Packages and containers for goods
297	Chairs and seats	D10	Measuring, testing, or signalling instruments
298	Land vehicles: dumping	D11	Jewelry, symbolic insignia, and ornaments
299	Mining or in situ disintegration of hard material	D12	Transportation
300	Brush, broom, and mop making	D13	Equipment for production, distribution, or transformation of energy
301	Land vehicles: wheels and axles	D14	Recording, communication, or information retrieval equipment
303	Fluid-pressure and analogous brake systems	D15	Machines not elsewhere specified
305	Wheel substitutes for land vehicles	D16	Photography and optical equipment
307	Electrical transmission or interconnection systems	D17	Musical instruments
310	Electrical generator or motor structure	D18	Printing and office machinery
312	Supports: cabinet structure	D19	Office supplies; artists` and teachers` materials
313	Electric lamp and discharge devices	D20	Sales and advertising equipment
314	Electric lamp and discharge devices: consumable electrodes	D21	Games, toys, and sports goods
315	Electric lamp and discharge devices: systems	D22	Arms, pyrotechnics, hunting and fishing equipment
318	Electricity: motive power systems	D23	Environmental heating and cooling; fluid handling and sanitary equipment
320	Electricity: battery or capacitor charging or discharging	D24	Medical and laboratory equipment
322	Electricity: single generator systems	D25	Building units and construction elements
323	Electricity: power supply or regulation systems	D26	Lighting
324	Electricity: measuring and testing	D27	Tobacco and smokers' supplies
326	Electronic digital logic circuitry	D28	Cosmetic products and toilet articles
327	Miscellaneous active electrical nonlinear devices, circuits, and systems	D29	Equipment for safety, protection, and rescue
329	Demodulators	D30	Animal husbandry
		D32	Washing, cleaning, or drying machine
		D34	Material or article handling equipment
		D99	Miscellaneous
		G9B	INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
		PLT	Plants
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Difference between Provisional and Nonprovisional Patent Application	Likelihood of confusion-Circuit Court tests How to Reply to a Cease and Desist Letter
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State & Federal Trade Secret Laws	Differences between TEAS and TEAS plus
Chart of Patent vs. Trade Secret	What Does Published for Opposition Mean?
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