U.S. PATENT AND TRADEMARK OFFICE
Information Products Division
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U.S. Patent Classification System - Classification Definitions
as of June 30, 2000

Class Listing

[Explanation of Data]

(definitions have been obtained from the Patents ASSIST CD-ROM which is produced by the U.S. Patent and Trademark Office Electronic Products Branch)

To view the definitions for a U.S. patent class, click on the class below.

List of U.S. Patent Classes

002 004 005 007 008 012 014 015 016 019 023 024 026 027 028 029 030 033 034 036 037 038 040 042 043 044 047 048 049 051 052 053 054 055 056 057 059 060 062 063 065 066 068 069 070 071 072 073 074 075 076 079 081 082 083 084 086 087 089 091 092 095 096 099 100 101 102 104 105 106 108 109 110 111 112 114 116 117 118 119 122 123 124 125 126 127 128 131 132 134 135 136 137 138 139 140 141 142 144 147 148 149 150 152 156 157 159 160 162 163 164 165 166 168 169 171 172 173 174 175 177 178 180 181 182 184 185 186 187 188 190 191 192 193 194 196 198 199 200 201 202 203 204 205 206 208 209 210 211 212 213 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 231 232 234 235 236 237 238 239 241 242 244 245 246 248 249 250 251 252 254 256 257 258 260 261 264 266 267 269 270 271 273 276 277 278 279 280 281 283 285 289 290 291 292 293 294 295 296 297 298 299 300 301 303 305 307 310 312 313 314 315 318 320 322 323 324 326 327 329 330 331 332 333 334 335 336 337 338 340 341 342 343 345 346 347 348 349 351 352 353 355 356 358 359 360 361 362 363 365 366 367 368 369 370 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 388 392 396 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 438 439 440 441 442 445 446 449 450 451 452 453 454 455 460 462 463 464 470 472 473 474 475 476 477 482 483 492 493 494 501 502 503 504 505 507 508 510 512 514 516 518 520 521 522 523 524 525 526 527 528 530 532 534 536 540 544 546 548 549 552 554 556 558 560 562 564 568 570 585 588 600 601 602 604 606 607 623 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 716 717 800 901 902 930 968 976 987 D14 D18 PLT

Class 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
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 ILLUMINAT ING
049 MOVABLE OR REMOVABLE CLOSURES
051 ABRASIVE TOOL MAKING PROCESS, MATERIAL, OR COMPOSITION
052 STATIC STRUCTURES (E.G., BUILDINGS)
053 PACKAGE MAKING
054 HARNESS
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
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
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
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 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
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
241 SOLID MATERIAL COMMINUTION OR DISINTEGRATION
242 WINDING, TENSIONING, OR GUIDING
244 AERONAUTICS
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
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
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 ACTUATEDSWITCHES
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, OPERATOR INTERFACE 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
359 OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS
360 DYNAMIC MAGNETIC INFORMA- TION STORAGE OR RETRIEVAL
361 ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES
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 TELEVISION SIGNAL PROCESSING FOR DYNAMIC RECORDING OR REPRODUCING
388 ELECTRICITY: MOTOR CONTROL SYSTEMS
392 ELECTRIC RESISTANCE HEATING DEVICES
396 PHOTOGRAPHY
399 ELECTROPHOTOGRAPHY
400 TYPEWRITING MACHINES
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
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 FLEXIBLECOUPLINGS 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
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
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 MAKING, STABILIZING, BREAKING, OR INHIBITING
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
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
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, DATA STRUCTURES, OR DOCUMENT PROCESSING
708 ELECTRICAL COMPUTERS: ARITHMETIC PROCESSING AND CALCULATING
709 ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: MULTIPLE COMPUTER OR PROCESS COORDINATING
710 ELECTRICAL COMPUTERS AND DIGITAL DATA PROCESSING SYSTEMS: INPUT/OUTPUT
711 ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: MEMORY
712 ELECTRICAL COMPUTERS AND DIGITAL DATA PROCESSING SYSTEMS: PROCESSING ARCHITECTURES AND INSTRUCTION PROCESSING (E.G. PROCESSORS)
713 ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: SUPPORT
714 ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: ERROR DETECTION/CORRECTION AND FAULT DETECTION/RECOVERY
716 DATA PROCESSING: DESIGN AND ANALYSIS OF CIRCUIT OR SEMICONDUCTOR MASK
717 DATA PROCESSING: SOFTWARE DEVELOPMENT, INSTALLATION AND MANAGEMENT
800 MULTICELLULAR LIVING ORGANISMS AND UNMODIFIED PARTS THEREOF AND RELATED PROCESSES
901 ROBOTS
902 ELECTRONIC FUNDS TRANSFER
930 PEPTIDE OR PROTEIN SEQUENCE
968 HOROLOGY
976 NUCLEAR TECHNOLOGY
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
D14 RECORDING, COMMUNICATION, OR INFORMATION RETRIEVAL EQUIPMENT
D18 PRINTING AND OFFICE MACHINERY
PLT PLANTS

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Last Modified: 6 October 2000