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Classification Resources
 
 

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Class Schedule (HTML) Class Schedule (PDF)
Class Definition (HTML) Class Definition (PDF)
US-to-IPC8 Concordance (HTML) US-to-IPC8 Concordance (PDF)
US-to-Locarno Concordance

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