PlainPatent

Patent Technology Classes

Browse US patents by Cooperative Patent Classification (CPC) technology area, built from official USPTO data via PatentsView. See our methodology.

670 CPC subclasses · Page 12 of 14

Technology Subclasses · Page 12 (551–600 of 670)

Code Technology Area Class Patents
F28G CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS F28 438
F24T GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS F24 436
A45B WALKING STICKS ; UMBRELLAS; LADIES' OR LIKE FANS A45 436
A47H FURNISHINGS FOR WINDOWS OR DOORS A47 430
F28B STEAM OR VAPOUR CONDENSERS F28 416
F24B DOMESTIC STOVES OR RANGES FOR SOLID FUELS ; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES F24 409
F03C POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS F03 404
G10G REPRESENTATION OF MUSIC; RECORDING MUSIC IN NOTATION FORM; ACCESSORIES FOR MUSIC OR MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR, e.g. SUPPORTS G10 395
C12G WINE; PREPARATION THEREOF; ALCOHOLIC BEVERAGES ; PREPARATION OF ALCOHOLIC BEVERAGES NOT PROVIDED FOR IN SUBCLASSES C12C OR C12H C12 389
B27K PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR ; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS B27 387
B60F VEHICLES FOR USE BOTH ON RAIL AND ON ROAD; AMPHIBIOUS OR LIKE VEHICLES; CONVERTIBLE VEHICLES B60 386
B21H MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS B21 386
C12H PASTEURISATION, STERILISATION, PRESERVATION, PURIFICATION, CLARIFICATION OR AGEING OF ALCOHOLIC BEVERAGES; METHODS FOR ALTERING THE ALCOHOL CONTENT OF FERMENTED SOLUTIONS OR ALCOHOLIC BEVERAGES C12 386
A22B SLAUGHTERING A22 381
A41G ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS A41 380
D01H SPINNING OR TWISTING D01 375
G21B FUSION REACTORS G21 372
D21G CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES D21 371
D02J FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE D02 369
B42F SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING B42 359
B43L ARTICLES FOR WRITING OR DRAWING UPON; ; WRITING OR DRAWING AIDS;; ACCESSORIES FOR WRITING OR DRAWING B43 358
C07G COMPOUNDS OF UNKNOWN CONSTITUTION C07 358
B68G METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR B68 357
E05G SAFES OR STRONG-ROOMS FOR VALUABLES; BANK PROTECTION DEVICES; SAFETY TRANSACTION PARTITIONS E05 351
G06M COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR G06 332
B42B PERMANENTLY ATTACHING TOGETHER SHEETS, QUIRES OR SIGNATURES OR PERMANENTLY ATTACHING OBJECTS THERETO B42 331
F03H PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR F03 321
B44D PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES B44 321
B61G COUPLINGS; DRAUGHT AND BUFFING APPLIANCES B61 314
A44D INDEXING SCHEME RELATING TO BUTTONS, PINS, BUCKLES OR SLIDE FASTENERS, AND TO JEWELLERY, BRACELETS OR OTHER PERSONAL ADORNMENTS A44 314
D21D TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE D21 314
F41F APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS ; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS F41 306
B27M WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES B27 306
G04D APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES G04 303
D01G PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING D01 292
B23G THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH B23 283
B44B MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING B44 274
D21J FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE D21 270
D05D INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING D05 266
C10C WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID C10 264
F22D PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS F22 238
B27F DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES B27 238
G03C PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES ; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY G03 231
G06E OPTICAL COMPUTING DEVICES; ; COMPUTING DEVICES USING OTHER RADIATIONS WITH SIMILAR PROPERTIES G06 229
D06L DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS D06 225
F23B METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL F23 220
B27C PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL B27 208
D06H MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS D06 206
F24V COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR F24 201
B27D WORKING VENEER OR PLYWOOD B27 200

CPC (Cooperative Patent Classification) data from USPTO PatentsView. Patents granted 2015–2025.