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 9 of 14
Technology Subclasses · Page 9 (401–450 of 670)
| Code | Technology Area | Class | Patents |
|---|---|---|---|
| F23C | METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN ; A CARRIER GAS OR; AIR | F23 | 1,571 |
| F03B | MACHINES OR ENGINES FOR LIQUIDS | F03 | 1,544 |
| C10B | DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS | C10 | 1,527 |
| E03D | WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR | E03 | 1,515 |
| E03B | INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER | E03 | 1,503 |
| B25H | WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS | B25 | 1,500 |
| F17D | PIPE-LINE SYSTEMS; PIPE-LINES | F17 | 1,470 |
| C07J | STEROIDS | C07 | 1,454 |
| B61D | BODY DETAILS OR KINDS OF RAILWAY VEHICLES | B61 | 1,451 |
| D02G | CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS | D02 | 1,439 |
| B07B | SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL | B07 | 1,431 |
| B65F | GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE | B65 | 1,429 |
| D21C | PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR | D21 | 1,427 |
| G04F | TIME-INTERVAL MEASURING | G04 | 1,418 |
| C10J | PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES ; CARBURETTING AIR OR OTHER GASES | C10 | 1,392 |
| E03F | SEWERS; CESSPOOLS | E03 | 1,375 |
| B66D | CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS | B66 | 1,354 |
| A22C | PROCESSING MEAT, POULTRY, OR FISH | A22 | 1,343 |
| F21L | LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION | F21 | 1,327 |
| B27B | SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR | B27 | 1,327 |
| B28D | WORKING STONE OR STONE-LIKE MATERIALS | B28 | 1,321 |
| E01F | ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE | E01 | 1,276 |
| H04K | SECRET COMMUNICATION; JAMMING OF COMMUNICATION | H04 | 1,274 |
| D06N | WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR | D06 | 1,265 |
| D21F | PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON | D21 | 1,255 |
| B21K | MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS | B21 | 1,246 |
| B63C | LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS | B63 | 1,244 |
| C08C | TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS | C08 | 1,240 |
| D06P | DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM | D06 | 1,234 |
| B04B | CENTRIFUGES | B04 | 1,233 |
| C05G | MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS ; FERTILISERS CHARACTERISED BY THEIR FORM | C05 | 1,232 |
| B09B | DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR | B09 | 1,226 |
| B63G | OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS | B63 | 1,181 |
| A63G | MERRY-GO-ROUNDS; SWINGS; ROCKING-HORSES; CHUTES; SWITCHBACKS; SIMILAR DEVICES FOR PUBLIC AMUSEMENT | A63 | 1,179 |
| C08H | DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS | C08 | 1,172 |
| H03D | DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER | H03 | 1,165 |
| B25D | PERCUSSIVE TOOLS | B25 | 1,146 |
| E21C | MINING OR QUARRYING | E21 | 1,136 |
| C05F | ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE | C05 | 1,129 |
| C11C | FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM | C11 | 1,114 |
| B25C | HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS | B25 | 1,109 |
| G01Q | SCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING PROBE MICROSCOPY [SPM] | G01 | 1,097 |
| B24C | ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL | B24 | 1,092 |
| A63C | SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE | A63 | 1,092 |
| A01P | BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS | A01 | 1,084 |
| F23J | REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES | F23 | 1,082 |
| C10K | PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE | C10 | 1,080 |
| A47D | FURNITURE SPECIALLY ADAPTED FOR CHILDREN | A47 | 1,075 |
| F23G | CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION | F23 | 1,073 |
| B67C | CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS | B67 | 1,069 |
CPC (Cooperative Patent Classification) data from USPTO PatentsView. Patents granted 2015–2025.