| 451 | HD | ABRADING |
| 51 | HD | ABRASIVE TOOL MAKING PROCESS, MATERIAL, OR COMPOSITION |
| 181 | HD | ACOUSTICS |
| 257 | HD | ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES) |
| 156 | HD | ADHESIVE BONDING AND MISCELLANEOUS CHEMICAL MANUFACTURE |
| 226 | HD | ADVANCING MATERIAL OF INDETERMINATE LENGTH |
| 244 | HD | AERONAUTICS |
| 366 | HD | AGITATING |
| 420 | HD | ALLOYS OR METALLIC COMPOSITIONS |
| 86 | HD | AMMUNITION AND EXPLOSIVE-CHARGE MAKING |
| 102 | HD | AMMUNITION AND EXPLOSIVES |
| 330 | HD | AMPLIFIERS |
| 472 | HD | AMUSEMENT DEVICES |
| 273 | HD | AMUSEMENT DEVICES: GAMES |
| 463 | HD | AMUSEMENT DEVICES: GAMES |
| 446 | HD | AMUSEMENT DEVICES: TOYS |
| 119 | HD | ANIMAL HUSBANDRY |
| D30 | HD | ANIMAL HUSBANDRY |
| 2 | HD | APPAREL |
| D02 | HD | APPAREL AND HABERDASHERY |
| 223 | HD | APPAREL APPARATUS |
| D22 | HD | ARMS, PYROTECHNCIS, HUNTING AND FISHING EQUIPMENT |
| 221 | HD | ARTICLE DISPENSING |
| 236 | HD | AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION |
| 4 | HD | BATHS, CLOSETS, SINKS, AND SPITTOONS |
| 136 | HD | BATTERIES: THERMOELECTRIC AND PHOTOELECTRIC |
| 384 | HD | BEARINGS |
| 5 | HD | BEDS |
| 449 | HD | BEE CULTURE |
| 402 | HD | BINDER DEVICE RELEASABLY ENGAGING APERTURE OR NOTCH OF SHEET |
| 8 | HD | BLEACHING AND DYEING; FLUID TREATMENT AND CHEMICAL MODIFICATION OF TEXTILES AND FIBERS |
| 412 | HD | BOOKBINDING: PROCESS AND APPARATUS |
| 281 | HD | BOOKS, STRIPS, AND LEAVES |
| 462 | HD | BOOKS, STRIPS, AND LEAVES FOR MANIFOLDING |
| 12 | HD | BOOT AND SHOE MAKING |
| 36 | HD | BOOTS, SHOES, AND LEGGINGS |
| 175 | HD | BORING OR PENETRATING THE EARTH |
| 215 | HD | BOTTLES AND JARS |
| 188 | HD | BRAKES |
| 14 | HD | BRIDGES |
| 300 | HD | BRUSH, BROOM, AND MOP MAKING |
| 15 | HD | BRUSHING, SCRUBBING, AND GENERAL CLEANING |
| D04 | HD | BRUSHWARE |
| 24 | HD | BUCKLES, BUTTONS, CLASPS, ETC. |
| D25 | HD | BUILDING UNITS AND CONSTRUCTION ELEMENTS |
| 441 | HD | BUOYS, RAFTS, AND AQUATIC DEVICES |
| 452 | HD | BUTCHERING |
| 79 | HD | BUTTON MAKING |
| 40 | HD | CARD, PICTURE, OR SIGN EXHIBITING |
| 502 | HD | CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING |
| 59 | HD | CHAIN, STAPLE, AND HORSESHOE MAKING |
| 297 | HD | CHAIRS AND SEATS |
| 194 | HD | CHECK-ACTUATED CONTROL MECHANISMS |
| 422 | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
| 260 | HD | CHEMISTRY OF CARBON COMPOUNDS |
| 585 | HD | CHEMISTRY OF HYDROCARBON COMPOUNDS |
| 423 | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
| 436 | HD | CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING |
| 204 | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
| 429 | HD | CHEMISTRY: ELECTRICAL CURRENT PRODUCING APPARATUS, PRODUCT, AND PROCESS |
| 71 | HD | CHEMISTRY: FERTILIZERS |
| 518 | HD | CHEMISTRY: FISCHER-TROPSCH PROCESSES; OR PURIFICATION OR RECOVERY OF PRODUCTS THEREOF |
| 435 | HD | CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY |
| 530 | HD | CHEMISTRY: NATURAL RESINS OR DERIVATIVES; PEPTIDES OR PROTEINS; LIGNINS OR REACTION PRODUCTS THEREOF |
| 23 | HD | CHEMISTRY: PHYSICAL PROCESSES |
| 279 | HD | CHUCKS OR SOCKETS |
| 209 | HD | CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS |
| 134 | HD | CLEANING AND LIQUID CONTACT WITH SOLIDS |
| 510 | HD | CLEANING COMPOSITIONS FOR SOLID SURFACES, AUXILIARY COMPOSITIONS THEREFOR, OR PROCESSES OF PREPARING THE COMPOSITIONS |
| 292 | HD | CLOSURE FASTENERS |
| 192 | HD | CLUTCHES AND POWER-STOP CONTROL |
| 118 | HD | COATING APPARATUS |
| 401 | HD | COATING IMPLEMENTS WITH MATERIAL SUPPLY |
| 427 | HD | COATING PROCESSES |
| 341 | HD | CODED DATA GENERATION OR CONVERSION |
| 372 | HD | COHERENT LIGHT GENERATORS |
| 453 | HD | COIN HANDLING |
| 516 | HD | COLLOID SYSTEMS AND WETTING AGENTS; SUBCOMBINATIONS THEREOF; PROCESSES OF |
| 431 | HD | COMBUSTION |
| 367 | HD | COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES |
| 342 | HD | COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION) |
| 340 | HD | COMMUNICATIONS: ELECTRICAL |
| 343 | HD | COMMUNICATIONS: RADIO WAVE ANTENNAS |
| 252 | HD | COMPOSITIONS |
| 501 | HD | COMPOSITIONS: CERAMIC |
| 106 | HD | COMPOSITIONS: COATING OR PLASTIC |
| 7 | HD | COMPOUND TOOLS |
| 345 | HD | COMPUTER GRAPHICS PROCESSING, OPERATOR INTERFACE PROCESSING, AND SELECTIVE VISUAL DISPLAY SYSTEMS |
| 159 | HD | CONCENTRATING EVAPORATORS |
| 193 | HD | CONVEYORS, CHUTES, SKIDS, GUIDES, AND WAYS |
| 406 | HD | CONVEYORS: FLUID CURRENT |
| 198 | HD | CONVEYORS: POWER-DRIVEN |
| 147 | HD | COOPERING |
| D28 | HD | COSMETIC PRODUCTS AND TOILET ARTICLES |
| 460 | HD | CROP THRESHING OR SEPARATING |
| 380 | HD | CRYPTOGRAPHY |
| 30 | HD | CUTLERY |
| 407 | HD | CUTTERS, FOR SHAPING |
| 83 | HD | CUTTING |
| 408 | HD | CUTTING BY USE OF ROTATING AXIALLY MOVING TOOL |
| 706 | HD | DATA PROCESSING: ARTIFICIAL INTELLIGENCE |
| 705 | HD | DATA PROCESSING: FINANCIAL, BUSINESS PRACTICE, MANAGEMENT, OR COST/PRICE DETERMINATION |
| 700 | HD | DATA PROCESSING: GENERIC CONTROL SYSTEMS OR SPECIFIC APPLICATIONS |
| 702 | HD | DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING |
| 704 | HD | DATA PROCESSING: SPEECH SIGNAL PROCESSING, LINGUISTICS, LANGUAGE TRANSLATION, AND AUDIO COMPRESSION/DECOMPRESSION |
| 701 | HD | DATA PROCESSING: VEHICLES, NAVIGATION, AND RELATIVE LOCATION |
| 329 | HD | DEMODULATORS |
| 433 | HD | DENTISTRY |
| 232 | HD | DEPOSIT AND COLLECTION RECEPTACLES |
| 222 | HD | DISPENSING |
| 202 | HD | DISTILLATION: APPARATUS |
| 203 | HD | DISTILLATION: PROCESSES, SEPARATORY |
| 201 | HD | DISTILLATION: PROCESSES, THERMOLYTIC |
| 424 | HD | DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS |
| 514 | HD | DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS |
| 34 | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
| 369 | HD | DYNAMIC INFORMATION STORAGE OR RETRIEVAL |
| 360 | HD | DYNAMIC MAGNETIC INFORMATION STORAGE OR RETRIEVAL |
| 507 | HD | EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY |
| 172 | HD | EARTH WORKING |
| D01 | HD | EDIBLE PRODUCTS |
| 434 | HD | EDUCATION AND DEMONSTRATION |
| 219 | HD | ELECTRIC HEATING |
| 313 | HD | ELECTRIC LAMP AND DISCHARGE DEVICES |
| 314 | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: CONSUMABLE ELECTRODES |
| 315 | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS |
| 445 | HD | ELECTRIC LAMP OR SPACE DISCHARGE COMPONENT OR DEVICE MANUFACTURING |
| 363 | HD | ELECTRIC POWER CONVERSION SYSTEMS |
| 392 | HD | ELECTRIC RESISTANCE HEATING DEVICES |
| 381 | HD | ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES |
| 710 | HD | ELECTRICAL COMPUTERS AND DIGITAL DATA PROCESSING SYSTEMS: INPUT/OUTPUT |
| 711 | HD | ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: MEMORY |
| 709 | HD | ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: MULTIPLE COMPUTER OR PROCESS COORDINATING |
| 712 | HD | ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: PROCESSING ARCHITECTURES AND INSTURCTION PROCESSING (E.G., PROCESSORS) |
| 713 | HD | ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: SUPPORT |
| 708 | HD | ELECTRICAL COMPUTERS: ARITHMETIC PROCESSING AND CALCULATING |
| 439 | HD | ELECTRICAL CONNECTORS |
| 310 | HD | ELECTRICAL GENERATOR OR MOTOR STRUCTURE |
| 377 | HD | ELECTRICAL PULSE COUNTERS, PULSE DIVIDERS, OR SHIFT REGISTERS: CIRCUITS AND SYSTEMS |
| 338 | HD | ELECTRICAL RESISTORS |
| 307 | HD | ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS |
| 320 | HD | ELECTRICITY: BATTERY OR CAPACITOR CHARGING OR DISCHARGING |
| 200 | HD | ELECTRICITY: CIRCUIT MAKERS AND BREAKERS |
| 174 | HD | ELECTRICITY: CONDUCTORS AND INSULATORS |
| 361 | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
| 337 | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 335 | HD | ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS |
| 324 | HD | ELECTRICITY: MEASURING AND TESTING |
| 318 | HD | ELECTRICITY: MOTIVE POWER SYSTEMS |
| 388 | HD | ELECTRICITY: MOTOR CONTROL SYSTEMS |
| 323 | HD | ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS |
| 322 | HD | ELECTRICITY: SINGLE GENERATOR SYSTEMS |
| 191 | HD | ELECTRICITY: TRANSMISSION TO VEHICLES |
| 205 | HD | ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS |
| 326 | HD | ELECTRONIC DIGITAL LOGIC CIRCUITRY |
| 902 | HD | ELECTRONIC FUNDS TRANSFER |
| 399 | HD | ELECTROPHOTOGRAPHY |
| 187 | HD | ELEVATOR, INDUSTRIAL LIFT TRUCK, OR STATIONARY LIFT FOR VEHICLE |
| 227 | HD | ELONGATED-MEMBER-DRIVING APPARATUS |
| 474 | HD | ENDLESS BELT POWER TRANSMISSION SYSTEMS OR COMPONENTS |
| 229 | HD | ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES |
| D23 | HD | ENVIRONMENTAL HEATING AND COOLING; FLUID HANDLING AND SANITARY EQUIPMENT |
| D07 | HD | EQUIPMENT FOR PREPARING OR SERVING FOOD OR DRINK NOT ELSEWHERE SPECIFIED |
| D13 | HD | EQUIPMENT FOR PRODUCTION, DISTRIBUTION, OR TRANSFORMATION OF ENERGY |
| D29 | HD | EQUIPMENT FOR SAFETY, PROTECTION, AND RESCUE (1) |
| 714 | HD | ERROR DETECTION/CORRECTION AND FAULT DETECTION/RECOVERY |
| 216 | HD | ETCHING A SUBSTRATE: PROCESSES |
| 37 | HD | EXCAVATING |
| 482 | HD | EXERCISE DEVICES |
| 411 | HD | EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER |
| 92 | HD | EXPANSIBLE CHAMBER DEVICES |
| 149 | HD | EXPLOSIVE AND THERMIC COMPOSITIONS OR CHARGES |
| 442 | HD | FABRIC (WOVEN, KNITTED, OR NONWOVEN TEXTILE OR CLOTH, ETC.) |
| 358 | HD | FACSIMILE AND STATIC PRESENTATION PROCESSING |
| 168 | HD | FARRIERY |
| 256 | HD | FENCES |
| 182 | HD | FIRE ESCAPE, LADDER, OR SCAFFOLD |
| 169 | HD | FIRE EXTINGUISHERS |
| 42 | HD | FIREARMS |
| 43 | HD | FISHING, TRAPPING, AND VERMIN DESTROYING |
| 383 | HD | FLEXIBLE BAGS |
| 160 | HD | FLEXIBLE OR PORTABLE CLOSURE, PARTITION, OR PANEL |
| 141 | HD | FLUENT MATERIAL HANDLING, WITH RECEIVER OR RECEIVER COACTING MEANS |
| 137 | HD | FLUID HANDLING |
| 416 | HD | FLUID REACTION SURFACES (I.E., IMPELLERS) |
| 239 | HD | FLUID SPRINKLING, SPRAYING, AND DIFFUSING |
| 303 | HD | FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS |
| 426 | HD | FOOD OR EDIBLE MATERIAL: PROCESSES, COMPOSITIONS, AND PRODUCTS |
| 99 | HD | FOODS AND BEVERAGES: APPARATUS |
| 450 | HD | FOUNDATION GARMENTS |
| 410 | HD | FREIGHT ACCOMMODATION ON FREIGHT CARRIER |
| 476 | HD | FRICTION GEAR TRANSMISSION SYSTEMS OR COMPONENTS |
| 44 | HD | FUEL AND RELATED COMPOSITIONS |
| 110 | HD | FURNACES |
| D06 | HD | FURNISHINGS |
| 473 | HD | GAMES USING TANGIBLE PROJECTILE |
| D21 | HD | GAMES, TOYS, AND SPORTS GOODS |
| 261 | HD | GAS AND LIQUID CONTACT APPARATUS |
| 55 | HD | GAS SEPARATION |
| 96 | HD | GAS SEPARATION: APPARATUS |
| 95 | HD | GAS SEPARATION: PROCESSES |
| 48 | HD | GAS: HEATING AND ILLUMINATING |
| 409 | HD | GEAR CUTTING, MILLING, OR PLANING |
| 33 | HD | GEOMETRICAL INSTRUMENTS |
| 65 | HD | GLASS MANUFACTURING |
| 294 | HD | HANDLING: HAND AND HOIST-LINE IMPLEMENTS |
| 54 | HD | HARNESS |
| 56 | HD | HARVESTERS |
| 588 | HD | HAZARDOUS OR TOXIC WASTE DESTRUCTION OR CONTAINMENT |
| 165 | HD | HEAT EXCHANGE |
| 432 | HD | HEATING |
| 237 | HD | HEATING SYSTEMS |
| 218 | HD | HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES |
| 108 | HD | HORIZONTALLY SUPPORTED PLANAR SURFACES |
| 968 | HD | HOROLOGY |
| 368 | HD | HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES |
| 405 | HD | HYDRAULIC AND EARTH ENGINEERING |
| 362 | HD | ILLUMINATION |
| 382 | HD | IMAGE ANALYSIS |
| 494 | HD | IMPERFORATE BOWL: CENTRIFUGAL SEPARATORS |
| 254 | HD | IMPLEMENTS OR APPARATUS FOR APPLYING PUSHING OR PULLING FORCE |
| 347 | HD | INCREMENTAL PRINTING OF SYMBOLIC INFORMATION |
| 376 | HD | INDUCED NUCLEAR REACTIONS: PROCESSES, SYSTEMS, AND ELEMENTS |
| 336 | HD | INDUCTOR DEVICES |
| 373 | HD | INDUSTRIAL ELECTRIC HEATING FURNACES |
| 395 | HD | INFORMATION PROCESSING SYSTEM ORGANIZATION |
| 123 | HD | INTERNAL-COMBUSTION ENGINES |
| 477 | HD | INTERRELATED POWER DELIVERY CONTROLS, INCLUDING ENGINE CONTROL |
| 63 | HD | JEWELRY |
| D11 | HD | JEWELRY, SYMBOLIC INSIGNIA, AND ORNAMENTS |
| 403 | HD | JOINTS AND CONNECTIONS |
| 289 | HD | KNOTS AND KNOT TYING |
| 280 | HD | LAND VEHICLES |
| 278 | HD | LAND VEHICLES: ANIMAL DRAFT APPLIANCES |
| 296 | HD | LAND VEHICLES: BODIES AND TOPS |
| 298 | HD | LAND VEHICLES: DUMPING |
| 301 | HD | LAND VEHICLES: WHEELS AND AXLES |
| 69 | HD | LEATHER MANUFACTURES |
| D26 | HD | LIGHTING |
| 349 | HD | LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS |
| 122 | HD | LIQUID HEATERS AND VAPORIZERS |
| 210 | HD | LIQUID PURIFICATION OR SEPARATION |
| 70 | HD | LOCKS |
| 184 | HD | LUBRICATION |
| 74 | HD | MACHINE ELEMENT OR MECHANISM |
| D15 | HD | MACHINES NOT ELSEWHERE SPECIFIED |
| 493 | HD | MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB |
| 440 | HD | MARINE PROPULSION |
| 414 | HD | MATERIAL OR ARTICLE HANDLING |
| D34 | HD | MATERIAL OR ARTICLE HANDLING EQUIPMENT |
| 73 | HD | MEASURING AND TESTING |
| D10 | HD | MEASURING, TESTING, OR SIGNALLING INSTRUMENTS (1) (2) |
| 124 | HD | MECHANICAL GUNS AND PROJECTORS |
| D24 | HD | MEDICAL AND LABORATORY EQUIPMENT |
| 186 | HD | MERCHANDISING |
| 72 | HD | METAL DEFORMING |
| 164 | HD | METAL FOUNDING |
| 228 | HD | METAL FUSION BONDING |
| 76 | HD | METAL TOOLS AND IMPLEMENTS, MAKING |
| 148 | HD | METAL TREATMENT |
| 29 | HD | METAL WORKING |
| 266 | HD | METALLURGICAL APPARATUS |
| 196 | HD | MINERAL OILS: APPARATUS |
| 208 | HD | MINERAL OILS: PROCESSES AND PRODUCTS |
| 299 | HD | MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL |
| D99 | HD | MISCELLANEOUS |
| 327 | HD | MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS |
| 16 | HD | MISCELLANEOUS HARDWARE |
| 332 | HD | MODULATORS |
| 180 | HD | MOTOR VEHICLES |
| 91 | HD | MOTORS: EXPANSIBLE CHAMBER TYPE |
| 185 | HD | MOTORS: SPRING, WEIGHT, OR ANIMAL POWERED |
| 49 | HD | MOVABLE OR REMOVABLE CLOSURES |
| 800 | HD | MULTICELLULAR LIVING ORGANISMS AND UNMODIFIED PARTS THEREOF AND RELATED PROCESSES |
| 370 | HD | MULTIPLEX COMMUNICATIONS |
| 84 | HD | MUSIC |
| 984 | HD | MUSICAL INSTRUMENTS |
| D17 | HD | MUSICAL INSTRUMENTS |
| 163 | HD | NEEDLE AND PIN MAKING |
| 976 | HD | NUCLEAR TECHNOLOGY |
| D19 | HD | OFFICE SUPPLIES; ARTISTS' AND TEACHERS' MATERIALS |
| 385 | HD | OPTICAL WAVEGUIDES |
| 351 | HD | OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING |
| 353 | HD | OPTICS: IMAGE PROJECTORS |
| 356 | HD | OPTICS: MEASURING AND TESTING |
| 352 | HD | OPTICS: MOTION PICTURES |
| 359 | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
| 89 | HD | ORDNANCE |
| 532 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 534 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 536 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 540 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 544 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 546 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 548 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 549 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 552 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 554 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 556 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 558 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 560 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 562 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 564 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 568 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 570 | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| 987 | HD | 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 |
| 331 | HD | OSCILLATORS |
| 224 | HD | PACKAGE AND ARTICLE CARRIERS |
| 53 | HD | PACKAGE MAKING |
| D09 | HD | PACKAGES AND CONTAINERS FOR GOODS |
| 162 | HD | PAPER MAKING AND FIBER LIBERATION |
| 930 | HD | PEPTIDE OR PROTEIN SEQUENCE |
| 512 | HD | PERFUME COMPOSITIONS |
| 355 | HD | PHOTOCOPYING |
| 396 | HD | PHOTOGRAPHY |
| D16 | HD | PHOTOGRAPHY AND OPTICAL EQUIPMENT |
| 285 | HD | PIPE JOINTS OR COUPLINGS |
| 138 | HD | PIPES AND TUBULAR CONDUITS |
| 475 | HD | PLANETARY GEAR TRANSMISSION SYSTEMS OR COMPONENTS |
| 47 | HD | PLANT HUSBANDRY |
| 504 | HD | PLANT PROTECTING AND REGULATING COMPOSITIONS |
| 111 | HD | PLANTING |
| PLT | HD | PLANTS |
| 264 | HD | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| 425 | HD | PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS |
| 419 | HD | POWDER METALLURGY PROCESSES |
| 60 | HD | POWER PLANTS |
| 100 | HD | PRESSES |
| 290 | HD | PRIME-MOVER DYNAMO PLANTS |
| 283 | HD | PRINTED MATTER |
| 101 | HD | PRINTING |
| D18 | HD | PRINTING AND OFFICE MACHINERY |
| 623 | HD | PROSTHESIS (I.E., ARTIFICIAL BODY MEMBERS), PARTS THEREOF, OR AIDS AND ACCESSORIES THEREFOR |
| 375 | HD | PULSE OR DIGITAL COMMUNICATIONS |
| 417 | HD | PUMPS |
| 150 | HD | PURSES, WALLETS, AND PROTECTIVE COVERS |
| 250 | HD | RADIANT ENERGY |
| 430 | HD | RADIATION IMAGERY CHEMISTRY: PROCESS, COMPOSITION, OR PRODUCT THEREOF |
| 213 | HD | RAILWAY DRAFT APPLIANCES |
| 258 | HD | RAILWAY MAIL DELIVERY |
| 105 | HD | RAILWAY ROLLING STOCK |
| 246 | HD | RAILWAY SWITCHES AND SIGNALS |
| 295 | HD | RAILWAY WHEELS AND AXLES |
| 104 | HD | RAILWAYS |
| 238 | HD | RAILWAYS: SURFACE TRACK |
| 220 | HD | RECEPTACLES |
| 503 | HD | RECORD RECEIVER HAVING PLURAL INTERACTIVE LEAVES OR A COLORLESS COLOR FORMER, METHOD OF USE, OR DEVELOPER THEREFOR |
| 346 | HD | RECORDERS |
| D14 | HD | RECORDING, COMMUNICATION, OR INFORMATION RETRIEVAL EQUIPMENT |
| 62 | HD | REFRIGERATION |
| 235 | HD | REGISTERS |
| 152 | HD | RESILIENT TIRES AND WHEELS |
| 404 | HD | ROAD STRUCTURE, PROCESS, OR APPARATUS |
| 901 | HD | ROBOTS |
| 492 | HD | ROLL OR ROLLER |
| 418 | HD | ROTARY EXPANSIBLE CHAMBER DEVICES |
| 415 | HD | ROTARY KINETIC FLUID MOTORS OR PUMPS |
| 464 | HD | ROTARY SHAFTS, GUDGEONS, HOUSINGS, AND FLEXIBLE COUPLINGS FOR ROTARY SHAFTS |
| 109 | HD | SAFES, BANK PROTECTION, OR A RELATED DEVICE |
| D20 | HD | SALES AND ADVERTISING EQUIPMENT |
| 277 | HD | SEAL FOR A JOINT OR JUNCTURE |
| 234 | HD | SELECTIVE CUTTING (E.G., PUNCHING) |
| 438 | HD | SEMICONDUCTOR DEVICE MANUFACTURING: PROCESS |
| 225 | HD | SEVERING BY TEARING OR BREAKING |
| 112 | HD | SEWING |
| 271 | HD | SHEET FEEDING OR DELIVERING |
| 413 | HD | SHEET METAL CONTAINER MAKING |
| 270 | HD | SHEET-MATERIAL ASSOCIATING |
| 114 | HD | SHIPS |
| 116 | HD | SIGNALS AND INDICATORS |
| 117 | HD | SINGLE-CRYSTAL, ORIENTED-CRYSTAL, AND EPITAXY GROWTH PROCESSES; NON-COATING APPARATUS THEREFOR |
| 508 | HD | SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS |
| 241 | HD | SOLID MATERIAL COMMINUTION OR DISINTEGRATION |
| 206 | HD | SPECIAL RECEPTACLE OR PACKAGE |
| 75 | HD | SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES |
| 267 | HD | SPRING DEVICES |
| 365 | HD | STATIC INFORMATION STORAGE AND RETRIEVAL |
| 249 | HD | STATIC MOLDS |
| 52 | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
| 428 | HD | STOCK MATERIAL OR MISCELLANEOUS ARTICLES |
| 125 | HD | STONE WORKING |
| 126 | HD | STOVES AND FURNACES |
| 127 | HD | SUGAR, STARCH, AND CARBOHYDRATES |
| 505 | HD | SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS |
| 248 | HD | SUPPORTS |
| 312 | HD | SUPPORTS: CABINET STRUCTURE |
| 211 | HD | SUPPORTS: RACKS |
| 128 | HD | SURGERY |
| 600 | HD | SURGERY |
| 604 | HD | SURGERY |
| 606 | HD | SURGERY |
| 601 | HD | SURGERY: KINESITHERAPY |
| 607 | HD | SURGERY: LIGHT, THERMAL, AND ELECTRICAL APPLICATION |
| 602 | HD | SURGERY: SPLINT, BRACE, OR BANDAGE |
| 520 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 521 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 522 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 523 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 524 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 525 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 526 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 527 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 528 | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| 455 | HD | TELECOMMUNICATIONS |
| 178 | HD | TELEGRAPHY |
| 379 | HD | TELEPHONIC COMMUNICATIONS |
| 348 | HD | TELEVISION |
| 386 | HD | TELEVISION SIGNAL PROCESSING FOR DYNAMIC RECORDING OR REPRODUCING |
| 135 | HD | TENT, CANOPY, UMBRELLA, OR CANE |
| D05 | HD | TEXTILE OR PAPER YARD GOODS; SHEET MATERIAL |
| 87 | HD | TEXTILES: BRAIDING, NETTING, AND LACE MAKING |
| 26 | HD | TEXTILES: CLOTH FINISHING |
| 19 | HD | TEXTILES: FIBER PREPARATION |
| 68 | HD | TEXTILES: FLUID TREATING APPARATUS |
| 38 | HD | TEXTILES: IRONING OR SMOOTHING |
| 66 | HD | TEXTILES: KNITTING |
| 28 | HD | TEXTILES: MANUFACTURING |
| 57 | HD | TEXTILES: SPINNING, TWISTING, AND TWINING |
| 139 | HD | TEXTILES: WEAVING |
| 374 | HD | THERMAL MEASURING AND TESTING |
| 470 | HD | THREADED, HEADED FASTENER, OR WASHER MAKING: PROCESS AND APPARATUS |
| 131 | HD | TOBACCO |
| D27 | HD | TOBACCO AND SMOKERS' SUPPLIES |
| 132 | HD | TOILET |
| 483 | HD | TOOL CHANGING |
| 173 | HD | TOOL DRIVING OR IMPACTING |
| 81 | HD | TOOLS |
| D08 | HD | TOOLS AND HARDWARE |
| 291 | HD | TRACK SANDERS |
| D12 | HD | TRANSPORTATION |
| D03 | HD | TRAVEL GOODS AND PERSONAL BELONGINGS |
| 212 | HD | TRAVERSING HOISTS |
| 190 | HD | TRUNKS AND HAND-CARRIED LUGGAGE |
| 334 | HD | TUNERS |
| 82 | HD | TURNING |
| 199 | HD | TYPE CASTING |
| 276 | HD | TYPESETTING |
| 400 | HD | TYPEWRITING MACHINES |
| 27 | HD | UNDERTAKING |
| 171 | HD | UNEARTHING PLANTS OR BURIED OBJECTS |
| 251 | HD | VALVES AND VALVE ACTUATION |
| 293 | HD | VEHICLE FENDERS |
| 454 | HD | VENTILATION |
| D32 | HD | WASHING, CLEANING, OR DRYING MACHINE |
| 333 | HD | WAVE TRANSMISSION LINES AND NETWORKS |
| 177 | HD | WEIGHING SCALES |
| 166 | HD | WELLS |
| 305 | HD | WHEEL SUBSTITUTES FOR LAND VEHICLES |
| 157 | HD | WHEELWRIGHT MACHINES |
| 231 | HD | WHIPS AND WHIP APPARATUS |
| 242 | HD | WINDING, TENSIONING, OR GUIDING |
| 245 | HD | WIRE FABRICS AND STRUCTURE |
| 140 | HD | WIREWORKING |
| 142 | HD | WOOD TURNING |
| 217 | HD | WOODEN RECEPTACLES |
| 144 | HD | WOODWORKING |
| 269 | HD | WORK HOLDERS |
| 378 | HD | X-RAY OR GAMMA RAY SYSTEMS OR DEVICES |
| 707 | HD | DATA PROCESSING: DATABASE AND FILE MANAGEMENT, DATA STRUCTURES, OR DOCUMENT PROCESSING |
