USPC Patent Classifications

Utility patents issued after May 2015 no longer get uspc assignments. Plant and Design patents are still assigned one or more uspc classification. Utility patents issued in or before May 2015 still have uspc classifications.

USPC Patent Classifications
4baths, closets, sinks, and spittoons
7compound tools
8bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
12boot and shoe making
15brushing, scrubbing, and general cleaning
16miscellaneous hardware (e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.)
19textiles: fiber preparation
23chemistry: physical processes
24buckles, buttons, clasps, etc.
26textiles: cloth finishing
28textiles: manufacturing
29metal working
33geometrical instruments
34drying and gas or vapor contact with solids
36boots, shoes, and leggings
38textiles: ironing or smoothing
40card, picture, or sign exhibiting
43fishing, trapping, and vermin destroying
44fuel and related compositions
47plant husbandry
48gas: heating and illuminating
49movable or removable closures
51abrasive tool making process, material, or composition
52static structures (e.g., buildings)
53package making
54harness for working animal
55gas separation
57textiles: spinning, twisting, and twining
59chain, staple, and horseshoe making
60power plants
65glass manufacturing
66textiles: knitting
68textiles: fluid treating apparatus
69leather manufactures
71chemistry: fertilizers
72metal deforming
73measuring and testing
74machine element or mechanism
75specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
76metal tools and implements, making
79button making
86ammunition and explosive-charge making
87textiles: braiding, netting, and lace making
91motors: expansible chamber type
92expansible chamber devices
95gas separation: processes
96gas separation: apparatus
99foods and beverages: apparatus
102ammunition and explosives
105railway rolling stock
106compositions: coating or plastic
108horizontally supported planar surfaces
109safes, bank protection, or a related device
116signals and indicators
117single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
118coating apparatus
119animal husbandry
122liquid heaters and vaporizers
123internal-combustion engines
124mechanical guns and projectors
125stone working
126stoves and furnaces
127sugar, starch, and carbohydrates
134cleaning and liquid contact with solids
135tent, canopy, umbrella, or cane
136batteries: thermoelectric and photoelectric
137fluid handling
138pipes and tubular conduits
139textiles: weaving
141fluent material handling, with receiver or receiver coacting means
142wood turning
148metal treatment
149explosive and thermic compositions or charges
150purses, wallets, and protective covers
152resilient tires and wheels
156adhesive bonding and miscellaneous chemical manufacture
157wheelwright machines
159concentrating evaporators
160flexible or portable closure, partition, or panel
162paper making and fiber liberation
163needle and pin making
164metal founding
165heat exchange
169fire extinguishers
171unearthing plants or buried objects
172earth working
173tool driving or impacting
174electricity: conductors and insulators
175boring or penetrating the earth
177weighing scales
180motor vehicles
182fire escape, ladder, or scaffold
185motors: spring, weight, or animal powered
187elevator, industrial lift truck, or stationary lift for vehicle
190trunks and hand-carried luggage
191electricity: transmission to vehicles
192192 clutches and power-stop control
193conveyors, chutes, skids, guides, and ways
194check-actuated control mechanisms
196mineral oils: apparatus
198conveyors: power-driven
199type casting
200electricity: circuit makers and breakers
201distillation: processes, thermolytic
202distillation: apparatus
203distillation: processes, separatory
204chemistry: electrical and wave energy
205electrolysis: processes, compositions used therein, and methods of preparing the compositions
206special receptacle or package
208mineral oils: processes and products
209classifying, separating, and assorting solids
210liquid purification or separation
211supports: racks
212traversing hoists
213railway draft appliances
215bottles and jars
216etching a substrate: processes
217wooden receptacles
218high-voltage switches with arc preventing or extinguishing devices
219electric heating
221article dispensing
223apparel apparatus
224package and article carriers
225severing by tearing or breaking
226advancing material of indeterminate length
227elongated-member-driving apparatus
228metal fusion bonding
229envelopes, wrappers, and paperboard boxes
231whips and whip apparatus
232deposit and collection receptacles
234selective cutting (e.g., punching)
236automatic temperature and humidity regulation
237heating systems
238railways: surface track
239fluid sprinkling, spraying, and diffusing
241solid material comminution or disintegration
242winding, tensioning, or guiding
244aeronautics and astronautics
245wire fabrics and structure
246railway switches and signals
249static molds
250radiant energy
251valves and valve actuation
254implements or apparatus for applying pushing or pulling force
257active solid-state devices (e.g., transistors, solid-state diodes)
258railway mail delivery
260chemistry of carbon compounds
261gas and liquid contact apparatus
264plastic and nonmetallic article shaping or treating: processes
266metallurgical apparatus
267spring devices
269work holders
270sheet-material associating
271sheet feeding or delivering
273amusement devices: games
277seal for a joint or juncture
278land vehicles: animal draft appliances
279chucks or sockets
280land vehicles
281books, strips, and leaves
283printed matter
285pipe joints or couplings
289knots and knot tying
290prime-mover dynamo plants
291track sanders
292closure fasteners
293vehicle fenders
294handling: hand and hoist-line implements
295railway wheels and axles
296land vehicles: bodies and tops
297chairs and seats
298land vehicles: dumping
299mining or in situ disintegration of hard material
300brush, broom, and mop making
301land vehicles: wheels and axles
303fluid-pressure and analogous brake systems
305wheel substitutes for land vehicles
307electrical transmission or interconnection systems
310electrical generator or motor structure
312supports: cabinet structure
313electric lamp and discharge devices
314electric lamp and discharge devices: consumable electrodes
315electric lamp and discharge devices: systems
318electricity: motive power systems
320electricity: battery or capacitor charging or discharging
322electricity: single generator systems
323electricity: power supply or regulation systems
324electricity: measuring and testing
326electronic digital logic circuitry
327miscellaneous active electrical nonlinear devices, circuits, and systems
333wave transmission lines and networks
335electricity: magnetically operated switches, magnets, and electromagnets
336inductor devices
337electricity: electrothermally or thermally actuated switches
338electrical resistors
340communications: electrical
341coded data generation or conversion
342communications: directive radio wave systems and devices (e.g., radar, radio navigation)
343communications: radio wave antennas
345computer graphics processing and selective visual display systems
347incremental printing of symbolic information
349liquid crystal cells, elements and systems
351optics: eye examining, vision testing and correcting
352optics: motion pictures
353optics: image projectors
356optics: measuring and testing
358facsimile and static presentation processing
359optical: systems and elements
360dynamic magnetic information storage or retrieval
361electricity: electrical systems and devices
363electric power conversion systems
365static information storage and retrieval
367communications, electrical: acoustic wave systems and devices
368horology: time measuring systems or devices
369dynamic information storage or retrieval
370multiplex communications
372coherent light generators
373industrial electric heating furnaces
374thermal measuring and testing
375pulse or digital communications
376induced nuclear reactions: processes, systems, and elements
377electrical pulse counters, pulse dividers, or shift registers: circuits and systems
378x-ray or gamma ray systems or devices
379telephonic communications
381electrical audio signal processing systems and devices
382image analysis
383flexible bags
385optical waveguides
386motion video signal processing for recording or reproducing
388electricity: motor control systems
392electric resistance heating devices
398optical communications
400typewriting machines
401coating implements with material supply
402binder device releasably engaging aperture or notch of sheet
403joints and connections
404road structure, process, or apparatus
405hydraulic and earth engineering
406conveyors: fluid current
407cutters, for shaping
408cutting by use of rotating axially moving tool
409gear cutting, milling, or planing
410freight accommodation on freight carrier
411expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
412bookbinding: process and apparatus
413sheet metal container making
414material or article handling
415rotary kinetic fluid motors or pumps
416fluid reaction surfaces (i.e., impellers)
418rotary expansible chamber devices
419powder metallurgy processes
420alloys or metallic compositions
422chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing
423chemistry of inorganic compounds
424drug, bio-affecting and body treating compositions
425plastic article or earthenware shaping or treating: apparatus
426food or edible material: processes, compositions, and products
427coating processes
428stock material or miscellaneous articles
429chemistry: electrical current producing apparatus, product, and process
430radiation imagery chemistry: process, composition, or product thereof
434education and demonstration
435chemistry: molecular biology and microbiology
436chemistry: analytical and immunological testing
438semiconductor device manufacturing: process
439electrical connectors
440marine propulsion
441buoys, rafts, and aquatic devices
442fabric (woven, knitted, or nonwoven textile or cloth, etc.)
445electric lamp or space discharge component or device manufacturing
446amusement devices: toys
449bee culture
450foundation garments
453coin handling
460crop threshing or separating
462books, strips, and leaves for manifolding
463amusement devices: games
464rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
470threaded, headed fastener, or washer making: process and apparatus
472amusement devices
473games using tangible projectile
474endless belt power transmission systems or components
475planetary gear transmission systems or components
476friction gear transmission systems or components
477interrelated power delivery controls, including engine control
482exercise devices
483tool changing
492roll or roller
493manufacturing container or tube from paper; or other manufacturing from a sheet or web
494imperforate bowl: centrifugal separators
501compositions: ceramic
502catalyst, solid sorbent, or support therefor: product or process of making
503record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor
504plant protecting and regulating compositions
505superconductor technology: apparatus, material, process
506combinatorial chemistry technology: method, library, apparatus
507earth boring, well treating, and oil field chemistry
508solid anti-friction devices, materials therefor, lubricant or separant compositions for moving solid surfaces, and miscellaneous mineral oil compositions
510cleaning compositions for solid surfaces, auxiliary compositions therefor, or processes of preparing the compositions
512perfume compositions
514drug, bio-affecting and body treating compositions
516colloid systems and wetting agents; subcombinations thereof; processes of
518chemistry: fischer-tropsch processes; or purification or recovery of products thereof
520synthetic resins or natural rubbers -- part of the class 520 series
521synthetic resins or natural rubbers -- part of the class 520 series
522synthetic resins or natural rubbers -- part of the class 520 series
523synthetic resins or natural rubbers -- part of the class 520 series
524synthetic resins or natural rubbers -- part of the class 520 series
525synthetic resins or natural rubbers -- part of the class 520 series
526synthetic resins or natural rubbers -- part of the class 520 series
527synthetic resins or natural rubbers -- part of the class 520 series
528synthetic resins or natural rubbers -- part of the class 520 series
530chemistry: natural resins or derivatives; peptides or proteins; lignins or reaction products thereof
532organic compounds -- part of the class 532-570 series
534organic compounds -- part of the class 532-570 series
536organic compounds -- part of the class 532-570 series
540organic compounds -- part of the class 532-570 series
544organic compounds -- part of the class 532-570 series
546organic compounds -- part of the class 532-570 series
548organic compounds -- part of the class 532-570 series
549organic compounds -- part of the class 532-570 series
552organic compounds -- part of the class 532-570 series
554organic compounds -- part of the class 532-570 series
556organic compounds -- part of the class 532-570 series
558organic compounds -- part of the class 532-570 series
560organic compounds -- part of the class 532-570 series
562organic compounds -- part of the class 532-570 series
564organic compounds -- part of the class 532-570 series
568organic compounds -- part of the class 532-570 series
570organic compounds -- part of the class 532-570 series
585chemistry of hydrocarbon compounds
588hazardous or toxic waste destruction or containment
601surgery: kinesitherapy
602surgery: splint, brace, or bandage
607surgery: light, thermal, and electrical application
623prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor
700data processing: generic control systems or specific applications
701data processing: vehicles, navigation, and relative location
702data processing: measuring, calibrating, or testing
703data processing: structural design, modeling, simulation, and emulation
704data processing: speech signal processing, linguistics, language translation, and audio compression/decompression
705data processing: financial, business practice, management, or cost/price determination
706data processing: artificial intelligence
707data processing: database and file management or data structures
708electrical computers: arithmetic processing and calculating
709electrical computers and digital processing systems: multicomputer data transferring
710electrical computers and digital data processing systems: input/output
711electrical computers and digital processing systems: memory
712electrical computers and digital processing systems: processing architectures and instruction processing (e.g., processors)
713electrical computers and digital processing systems: support
714error detection/correction and fault detection/recovery
715data processing: presentation processing of document, operator interface processing, and screen saver display processing
716computer-aided design and analysis of circuits and semiconductor masks
717data processing: software development, installation, and management
718electrical computers and digital processing systems: virtual machine task or process management or task management/control
719electrical computers and digital processing systems: interprogram communication or interprocess communication (ipc)
720dynamic optical information storage or retrieval
725interactive video distribution systems
726information security
800multicellular living organisms and unmodified parts thereof and related processes
850scanning-probe techniques or apparatus; applications of scanning-probe techniques, e.g., scanning probe microscopy [spm]
902electronic funds transfer
903hybrid electric vehicles (hevs)
930peptide or protein sequence
976nuclear technology
984musical instruments
987organic compounds containing a bi, sb, as, or p atom or containing a metal atom of the 6th to 8th group of the periodic system
D1edible products
D2apparel and haberdashery
D3travel goods and personal belongings
D5textile or paper yard goods; sheet material
D7equipment for preparing or serving food or drink not elsewhere specified
D8tools and hardware
D9packages and containers for goods
D10measuring, testing, or signalling instruments
D11jewelry, symbolic insignia, and ornaments
D13equipment for production, distribution, or transformation of energy
D14recording, communication, or information retrieval equipment
D15machines not elsewhere specified
D16photography and optical equipment
D17musical instruments
D18printing and office machinery
D19office supplies; artists and teachers materials
D20sales and advertising equipment
D21games, toys, and sports goods
D22arms, pyrotechnics, hunting and fishing equipment
D23environmental heating and cooling; fluid handling and sanitary equipment
D24medical and laboratory equipment
D25building units and construction elements
D27tobacco and smokers' supplies
D28cosmetic products and toilet articles
D29equipment for safety, protection, and rescue
D30animal husbandry
D32washing, cleaning, or drying machine
D34material or article handling equipment
G9Binformation storage based on relative movement between record carrier and transducer

Other classification systems