| Class | Description | Top Inventors | Number of Patent applications |
|---|
| 002 | Apparel | William L. Grilliot | 6629 |
| 004 | Baths, closets, sinks, and spittoons | William T. Ball | 3278 |
| 005 | Beds | Roger P. Jackson | 4318 |
| 007 | Compound tools | Spencer Frazer | 328 |
| 008 | Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers | Mark Robert Sivik | 1867 |
| 012 | Boot and shoe making | James C. Meschter | 219 |
| 014 | Bridges | David Johnson | 309 |
| 015 | Brushing, scrubbing, and general cleaning | Wayne Ernest Conrad | 6453 |
| 016 | Miscellaneous hardware (e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.) | Jin-Xin Wang | 2361 |
| 019 | Textiles: fiber preparation | Thomas Schmitz | 125 |
| 023 | Chemistry: physical processes | Terje Fuglerud | 32 |
| 024 | Buckles, buttons, clasps, etc. | Keiichi Keyaki | 3277 |
| 026 | Textiles: cloth finishing | Frank Catallo | 35 |
| 027 | Undertaking | Ilija Rojdev | 202 |
| 028 | Textiles: manufacturing | Mathias Stündl | 257 |
| 029 | Metal working | Levi A. Campbell | 12607 |
| 030 | Cutlery | Kevin James Wain | 3192 |
| 033 | Geometrical instruments | Clark H. Briggs | 2178 |
| 034 | Drying and gas or vapor contact with solids | Andreas Stolze | 2234 |
| 036 | Boots, shoes, and leggings | Frederick J. Dojan | 3761 |
| 037 | Excavating | James Robert Lahood | 932 |
| 038 | Textiles: ironing or smoothing | Yong Jiang | 232 |
| 040 | Card, picture, or sign exhibiting | David Mayer | 2490 |
| 042 | Firearms | Michael T. Mayberry | 2329 |
| 043 | Fishing, trapping, and vermin destroying | Bruce Donoho | 2187 |
| 044 | Fuel and related compositions | Dingrong Bai | 2014 |
| 047 | Plant husbandry | Donald E. Weder | 2310 |
| 048 | Gas: heating and illuminating | Earl T. Robinson | 712 |
| 049 | Movable or removable closures | David W. Lahnala | 2771 |
| 051 | Abrasive tool making process, material, or composition | Srinivasan Ramanath | 720 |
| 052 | Static structures (e.g., buildings) | Darko Pervan | 10803 |
| 053 | Package making | Donald E. Weder | 3864 |
| 054 | Harness for working animal | Monty L. Ruetenik | 196 |
| 055 | Gas separation | Steven Scott Gieseke | 1925 |
| 056 | Harvesters | Randy Lohrentz | 1730 |
| 057 | Textiles: spinning, twisting, and twining | Chia-Te Chou | 361 |
| 059 | Chain, staple, and horseshoe making | Shoichiro Komiya | 160 |
| 060 | Power plants | Gabriel L. Suciu | 16809 |
| 062 | Refrigeration | Michael F. Taras | 10595 |
| 063 | Jewelry | Bryan Fan | 692 |
| 065 | Glass manufacturing | Aaron Morgan Huber | 1872 |
| 066 | Textiles: knitting | Tiberio Lonati | 366 |
| 068 | Textiles: fluid treating apparatus | Doo Young Ryu | 1179 |
| 069 | Leather manufactures | Kurt Pedersen | 29 |
| 070 | Locks | Toshiharu Katagiri | 2172 |
| 071 | Chemistry: fertilizers | John Larry Sanders | 711 |
| 072 | Metal deforming | Sergey Fedorovich Golovashchenko | 3114 |
| 073 | Measuring and testing | Anthony D. Kurtz | 19322 |
| 074 | Machine element or mechanism | Yoshimitsu Miki | 8005 |
| 075 | Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures | Robert Millner | 1590 |
| 076 | Metal tools and implements, making | John H. Stevens | 121 |
| 079 | Button making | Scott Hay | 1 |
| 081 | Tools | Bobby Hu | 2557 |
| 082 | Turning | Ming-Lu Yang | 402 |
| 083 | Cutting | Stephen F. Gass | 3529 |
| 084 | Music | Ichiro Osuga | 2960 |
| 086 | Ammunition and explosive-charge making | Ryusuke Kitamura | 124 |
| 087 | Textiles: braiding, netting, and lace making | Tan Q. Dinh | 107 |
| 089 | Ordnance | David L. Hunn | 1705 |
| 091 | Motors: expansible chamber type | Clemens Krebs | 475 |
| 092 | Expansible chamber devices | Michael T. Lapp | 1019 |
| 095 | Gas separation: processes | Harry W. Deckman | 2670 |
| 096 | Gas separation: apparatus | Youzou Yano | 1587 |
| 099 | Foods and beverages: apparatus | Jean-Luc Denisart | 3181 |
| 100 | Presses | Kevin M. Smith | 815 |
| 101 | Printing | Thomas Timothy Byrne | 2593 |
| 102 | Ammunition and explosives | Jahangir S. Rastegar | 1448 |
| 104 | Railways | David W. Crawford | 655 |
| 105 | Railway rolling stock | James W. Forbes | 774 |
| 106 | Compositions: coating or plastic | Peter G. Odell | 3217 |
| 108 | Horizontally supported planar surfaces | Mitch Johnson | 1323 |
| 109 | Safes, bank protection, or a related device | Bruce Pendleton | 200 |
| 110 | Furnaces | Toshihiko Yamada | 865 |
| 111 | Planting | Nathan A Mariman | 654 |
| 112 | Sewing | Masashi Tokura | 651 |
| 114 | Ships | Joop Roodenburg | 2296 |
| 116 | Signals and indicators | Dawn E. Smith | 778 |
| 117 | Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor | Hiroshi Kishi | 1132 |
| 118 | Coating apparatus | Shao-Kai Pei | 3430 |
| 119 | Animal husbandry | Henk Hofman | 4385 |
| 122 | Liquid heaters and vaporizers | Jan Brückner | 830 |
| 123 | Internal-combustion engines | Ross Dykstra Pursifull | 13538 |
| 124 | Mechanical guns and projectors | Mathew A. Mcpherson | 1182 |
| 125 | Stone working | Koji Kitagawa | 329 |
| 126 | Stoves and furnaces | Paul Bryan Cadima | 3285 |
| 127 | Sugar, starch, and carbohydrates | Aharon Eyal | 277 |
| 128 | Surgery | Peter Chi Fai Ho | 7777 |
| 131 | Tobacco | Qiuming Liu | 1962 |
| 132 | Toilet | Nghi Van Nguyen | 2898 |
| 134 | Cleaning and liquid contact with solids | Helmut Jerg | 6214 |
| 135 | Tent, canopy, umbrella, or cane | Oliver Joen-An Ma | 1370 |
| 136 | Batteries: thermoelectric and photoelectric | Devendra K. Sadana | 11878 |
| 137 | Fluid handling | Nobukazu Ikeda | 9816 |
| 138 | Pipes and tubular conduits | Larry W. Kiest, Jr. | 2244 |
| 139 | Textiles: weaving | Christian Gerth | 356 |
| 140 | Wireworking | Takahiro Nagaoka | 175 |
| 141 | Fluent material handling, with receiver or receiver coacting means | Ludwig Clüsserath | 2465 |
| 142 | Wood turning | Stuart Batty | 8 |
| 144 | Woodworking | Earl Barker | 604 |
| 147 | Coopering | Breck Waterman | 8 |
| 148 | Metal treatment | William L. Johnson | 3215 |
| 149 | Explosive and thermic compositions or charges | Graylon K. Williams | 257 |
| 150 | Purses, wallets, and protective covers | Laurie Mcfadden | 531 |
| 152 | Resilient tires and wheels | Paul Harry Sandstrom | 3338 |
| 156 | Adhesive bonding and miscellaneous chemical manufacture | Maurizio Marchini | 11605 |
| 157 | Wheelwright machines | Lawrence J. Lawson | 189 |
| 159 | Concentrating evaporators | Bernard F. Duesel, Jr. | 133 |
| 160 | Flexible or portable closure, partition, or panel | Willis Jay Mullet | 2119 |
| 162 | Paper making and fiber liberation | Stephen J. Mccullough | 2268 |
| 163 | Needle and pin making | Tatsuya Okada | 5 |
| 164 | Metal founding | Theodore A. Waniuk | 1551 |
| 165 | Heat exchange | Levi A. Campbell | 8853 |
| 166 | Wells | Michael L. Fripp | 12863 |
| 168 | Farriery | Garrett N. Ford | 74 |
| 169 | Fire extinguishers | Peter Cordani | 1141 |
| 171 | Unearthing plants or buried objects | Tatsuo Masuda | 39 |
| 172 | Earth working | Joseph D. Bassett | 964 |
| 173 | Tool driving or impacting | Heiko Roehm | 1732 |
| 174 | Electricity: conductors and insulators | Douglas B. Gundel | 11390 |
| 175 | Boring or penetrating the earth | David R. Hall | 4138 |
| 177 | Weighing scales | Shigeru Endo | 695 |
| 178 | Telegraphy | Kia Silverbrook | 380 |
| 180 | Motor vehicles | Yoshimoto Matsuda | 5490 |
| 181 | Acoustics | Peter M. Eick | 1606 |
| 182 | Fire escape, ladder, or scaffold | N. Ryan Moss | 1554 |
| 184 | Lubrication | Zdravko Paluncic | 564 |
| 185 | Motors: spring, weight, or animal powered | Renato Ribeiro | 57 |
| 186 | Merchandising | Michael Mack | 36 |
| 187 | Elevator, industrial lift truck, or stationary lift for vehicle | Ari Kattainen | 1548 |
| 188 | Brakes | Johann Baumgartner | 3440 |
| 190 | Trunks and hand-carried luggage | Wei-Hung Lai | 500 |
| 191 | Electricity: transmission to vehicles | Gunnar Asplund | 210 |
| 192 | Clutches and power-stop control | Farzad Samie | 2637 |
| 193 | Conveyors, chutes, skids, guides, and ways | Bryan Spiess | 155 |
| 194 | Check-actuated control mechanisms | Kazuhiro Doi | 385 |
| 196 | Mineral oils: apparatus | Colin G. Caro | 58 |
| 198 | Conveyors: power-driven | Matthew L. Fourney | 3531 |
| 200 | Electricity: circuit makers and breakers | Chao Chen | 3831 |
| 201 | Distillation: processes, thermolytic | Ronald Kim | 321 |
| 202 | Distillation: apparatus | Dean Kamen | 394 |
| 203 | Distillation: processes, separatory | Joon-Ho Shin | 658 |
| 204 | Chemistry: electrical and wave energy | Vamsee K. Pamula | 6926 |
| 205 | Electrolysis: processes, compositions used therein, and methods of preparing the compositions | Benjamin J. Feldman | 5059 |
| 206 | Special receptacle or package | Donald E. Weder | 9426 |
| 208 | Mineral oils: processes and products | Omer Refa Koseoglu | 2542 |
| 209 | Classifying, separating, and assorting solids | Christian Newman | 1603 |
| 210 | Liquid purification or separation | Robert W. Childers | 13425 |
| 211 | Supports: racks | Stephen N. Hardy | 2912 |
| 212 | Traversing hoists | Hans-Dieter Willim | 514 |
| 213 | Railway draft appliances | Jerry R. Smerecky | 128 |
| 215 | Bottles and jars | Takao Iizuka | 1830 |
| 216 | Etching a substrate: processes | Yoshiyuki Kamata | 2809 |
| 217 | Wooden receptacles | John R. Cannon | 20 |
| 218 | High-voltage switches with arc preventing or extinguishing devices | Dietmar Gentsch | 597 |
| 219 | Electric heating | Steven R. Peters | 9009 |
| 220 | Receptacles | Daniel Lee Bizzell | 8638 |
| 221 | Article dispensing | Yun-Lung Chen | 1557 |
| 222 | Dispensing | Nick E. Ciavarella | 5532 |
| 223 | Apparel apparatus | Stanley F. Gouldson | 473 |
| 224 | Package and article carriers | Chris Sautter | 3241 |
| 225 | Severing by tearing or breaking | Michael Albert Joseph, Ii | 319 |
| 226 | Advancing material of indeterminate length | Nobuhiro Nakai | 263 |
| 227 | Elongated-member-driving apparatus | Frederick E. Shelton, Iv | 2528 |
| 228 | Metal fusion bonding | Scott M. Packer | 1829 |
| 229 | Envelopes, wrappers, and paperboard boxes | Raymond R. Spivey, Sr. | 1454 |
| 231 | Whips and whip apparatus | Per Ib Rosendal Andersen | 6 |
| 232 | Deposit and collection receptacles | David J. Bolles | 93 |
| 234 | Selective cutting (e.g., punching) | Peter Benischke | 11 |
| 235 | Registers | Paul Lapstun | 7583 |
| 236 | Automatic temperature and humidity regulation | Daniel Adam Warren | 689 |
| 237 | Heating systems | Andreas Collmer | 336 |
| 238 | Railways: surface track | Winfried Bösterling | 330 |
| 239 | Fluid sprinkling, spraying, and diffusing | Huasong Zhou | 5760 |
| 241 | Solid material comminution or disintegration | Tai Hoon K. Matlin | 2590 |
| 242 | Winding, tensioning, or guiding | Masaru Ukita | 2606 |
| 244 | Aeronautics and astronautics | Bernard Guering | 6294 |
| 245 | Wire fabrics and structure | Francesco Ferraiolo | 11 |
| 246 | Railway switches and signals | Ajith Kuttannair Kumar | 373 |
| 248 | Supports | Jeffrey D. Carnevali | 8588 |
| 249 | Static molds | Artur Schwoerer | 442 |
| 250 | Radiant energy | Jason Lee Wildgoose | 18708 |
| 251 | Valves and valve actuation | Jens Hoppe | 3850 |
| 252 | Compositions | Masayuki Saito | 9516 |
| 254 | Implements or apparatus for applying pushing or pulling force | Gerhard Finkbeiner | 1320 |
| 256 | Fences | Dallas James | 806 |
| 257 | Active solid-state devices (e.g., transistors, solid-state diodes) | Shunpei Yamazaki | 84866 |
| 260 | Chemistry of carbon compounds | Hilda B. Vroman | 16 |
| 261 | Gas and liquid contact apparatus | Mark Joseph Staniforth | 882 |
| 264 | Plastic and nonmetallic article shaping or treating: processes | Shou-Shan Fan | 10120 |
| 266 | Metallurgical apparatus | Paul V. Cooper | 630 |
| 267 | Spring devices | Joshua R. Leonard | 1380 |
| 269 | Work holders | Takayuki Kawakami | 1420 |
| 270 | Sheet-material associating | Nobuyoshi Suzuki | 586 |
| 271 | Sheet feeding or delivering | Tetsuo Asada | 3504 |
| 273 | Amusement devices: games | Attila Grauzer | 2285 |
| 277 | Seal for a joint or juncture | Glenn M. Garrison | 2763 |
| 279 | Chucks or sockets | Franz Haimer | 647 |
| 280 | Land vehicles | Osamu Fukawatase | 10429 |
| 281 | Books, strips, and leaves | Bobby G. James, Jr. | 330 |
| 283 | Printed matter | Pierre Degott | 816 |
| 285 | Pipe joints or couplings | Peter C. Williams | 3214 |
| 289 | Knots and knot tying | Cheong Choon Ng | 53 |
| 290 | Prime-mover dynamo plants | Henrik Stiesdal | 5011 |
| 291 | Track sanders | Werner Bartling | 14 |
| 292 | Closure fasteners | Thorsten Bendel | 1934 |
| 293 | Vehicle fenders | Christian Handing | 642 |
| 294 | Handling: hand and hoist-line implements | Kenjiro Murakami | 1536 |
| 295 | Railway wheels and axles | Xaver Wirth | 31 |
| 296 | Land vehicles: bodies and tops | Udo Mildner | 6624 |
| 297 | Chairs and seats | Johnathan Andrew Line | 7142 |
| 298 | Land vehicles: dumping | Bobby Rogers | 125 |
| 299 | Mining or in situ disintegration of hard material | David R. Hall | 717 |
| 300 | Brush, broom, and mop making | Sung-Hwan Kwon | 60 |
| 301 | Land vehicles: wheels and axles | Raphael Schlanger | 1301 |
| 303 | Fluid-pressure and analogous brake systems | Michael Kunz | 922 |
| 305 | Wheel substitutes for land vehicles | Mark S. Diekevers | 368 |
| 307 | Electrical transmission or interconnection systems | Aristeidis Karalis | 9739 |
| 310 | Electrical generator or motor structure | Bradley D. Chamberlin | 13249 |
| 312 | Supports: cabinet structure | Yun-Lung Chen | 3837 |
| 313 | Electric lamp and discharge devices | Shou-Shan Fan | 6508 |
| 315 | Electric lamp and discharge devices: systems | John L. Melanson | 11899 |
| 318 | Electricity: motive power systems | Steven E. Schulz | 6269 |
| 320 | Electricity: battery or capacitor charging or discharging | Shinji Ichikawa | 8705 |
| 322 | Electricity: single generator systems | Gregory I. Rozman | 490 |
| 323 | Electricity: power supply or regulation systems | Weihong Qiu | 6057 |
| 324 | Electricity: measuring and testing | Udo Ausserlechner | 19885 |
| 326 | Electronic digital logic circuitry | Steven Teig | 2581 |
| 327 | Miscellaneous active electrical nonlinear devices, circuits, and systems | Yantao Ma | 12384 |
| 329 | Demodulators | Alexandre Dupuy | 90 |
| 330 | Amplifiers | Nadim Khlat | 4489 |
| 331 | Oscillators | Akinori Yamada | 2396 |
| 332 | Modulators | Zdravko Lukic | 252 |
| 333 | Wave transmission lines and networks | Hiroyuki Nakamura | 4162 |
| 334 | Tuners | Chewn-Pu Jou | 52 |
| 335 | Electricity: magnetically operated switches, magnets, and electromagnets | Larry W. Fullerton | 1990 |
| 336 | Inductor devices | Benjamin Weber | 2751 |
| 337 | Electricity: electrothermally or thermally actuated switches | Hideaki Takeda | 579 |
| 338 | Electrical resistors | Clark L. Smith | 498 |
| 340 | Communications: electrical | Lowell L. Wood, Jr. | 23391 |
| 341 | Coded data generation or conversion | Shiro Dosho | 4379 |
| 342 | Communications: directive radio wave systems and devices (e.g., radar, radio navigation) | Charles Abraham | 6602 |
| 343 | Communications: radio wave antennas | Robert W. Schlub | 8280 |
| 345 | Computer graphics processing and selective visual display systems | Katsuhide Uchino | 59015 |
| 346 | Recorders | Klaus Hug | 25 |
| 347 | Incremental printing of symbolic information | Kia Silverbrook | 16322 |
| 348 | Television | Canon Kabushiki Kaisha | 46801 |
| 349 | Liquid crystal cells, elements and systems | Shunpei Yamazaki | 14639 |
| 351 | Optics: eye examining, vision testing and correcting | Ronald D. Blum | 4422 |
| 352 | Optics: motion pictures | Hwan Chul Kim | 72 |
| 353 | Optics: image projectors | Koji Hirata | 3223 |
| 355 | Photocopying | Yuichi Shibazaki | 3966 |
| 356 | Optics: measuring and testing | Robert E. Bridges | 12537 |
| 358 | Facsimile and static presentation processing | Canon Kabushiki Kaisha | 17333 |
| 359 | Optical: systems and elements | Tsung Han Tsai | 19939 |
| 360 | Dynamic magnetic information storage or retrieval | Kenichiro Yamada | 5766 |
| 361 | Electricity: electrical systems and devices | Zheng-Heng Sun | 27104 |
| 362 | Illumination | Shao-Han Chang | 22594 |
| 363 | Electric power conversion systems | Ta-Yung Yang | 6265 |
| 365 | Static information storage and retrieval | Frankie F. Roohparvar | 18866 |
| 366 | Agitating | Eugene J. Kozlowski | 1951 |
| 367 | Communications, electrical: acoustic wave systems and devices | Joel D. Brewer | 3529 |
| 368 | Horology: time measuring systems or devices | Kenji Ogasawara | 1849 |
| 369 | Dynamic information storage or retrieval | Koji Takazawa | 5564 |
| 370 | Multiplex communications | Peter Gaal | 72393 |
| 372 | Coherent light generators | Masaki Ueno | 4432 |
| 373 | Industrial electric heating furnaces | Thomas Matschullat | 189 |
| 374 | Thermal measuring and testing | John A. Lane | 2225 |
| 375 | Pulse or digital communications | Marta Karczewicz | 29292 |
| 376 | Induced nuclear reactions: processes, systems, and elements | Roderick A. Hyde | 1830 |
| 377 | Electrical pulse counters, pulse dividers, or shift registers: circuits and systems | Youichi Tobita | 491 |
| 378 | X-ray or gamma ray systems or devices | Young-Hun Sung | 6285 |
| 379 | Telephonic communications | Robert C. Steiner | 5938 |
| 380 | Cryptography | Mathieu Ciet | 4819 |
| 381 | Electrical audio signal processing systems and devices | Hiroshi Akino | 13770 |
| 382 | Image analysis | Geoffrey B. Rhoads | 29523 |
| 383 | Flexible bags | Shaun T. Broering | 1660 |
| 384 | Bearings | Peter Niebling | 3475 |
| 385 | Optical waveguides | James Phillip Luther | 9029 |
| 386 | Television signal processing for dynamic recording or reproducing | Hideo Ando | 5559 |
| 388 | Electricity: motor control systems | Hua Zou | 89 |
| 392 | Electric resistance heating devices | Joseph M. Ranish | 1073 |
| 396 | Photography | Kazuharu Imafuji | 2440 |
| 398 | Optical communications | Ting Wang | 8710 |
| 399 | Electrophotography | Shougo Sato | 15111 |
| 400 | Typewriting machines | Koshiro Yamaguchi | 1112 |
| 401 | Coating implements with material supply | Jean-Louis Gueret | 1596 |
| 402 | Binder device releasably engaging aperture or notch of sheet | Chun Yuen To | 211 |
| 403 | Joints and connections | Steven E. Morris | 3126 |
| 404 | Road structure, process, or apparatus | Günter Hähn | 1448 |
| 405 | Hydraulic and earth engineering | Joop Roodenburg | 3392 |
| 406 | Conveyors: fluid current | Göran Sundholm | 416 |
| 407 | Cutters, for shaping | Gil Hecht | 1115 |
| 408 | Cutting by use of rotating axially moving tool | Tatsuo Nakahata | 1251 |
| 409 | Gear cutting, milling, or planing | Richard W. Ryai, Sr. | 725 |
| 410 | Freight accommodation on freight carrier | John D. Anderson | 526 |
| 411 | Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener | Jiri Babej | 2193 |
| 412 | Bookbinding: process and apparatus | Nobuyoshi Suzuki | 365 |
| 413 | Sheet metal container making | Gregory H. Butcher | 90 |
| 414 | Material or article handling | Christopher Hofmeister | 5598 |
| 415 | Rotary kinetic fluid motors or pumps | Gabriel L. Suciu | 8076 |
| 416 | Fluid reaction surfaces (i.e., impellers) | Frank B. Stamps | 6533 |
| 417 | Pumps | Masaki Ota | 6413 |
| 418 | Rotary expansible chamber devices | Byeongchul Lee | 1845 |
| 419 | Powder metallurgy processes | Hideaki Kawata | 880 |
| 420 | Alloys or metallic compositions | David R. Whitcomb | 1840 |
| 422 | Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing | Abbas Hassan | 8161 |
| 423 | Chemistry of inorganic compounds | Hartwig Rauleder | 7171 |
| 424 | Drug, bio-affecting and body treating compositions | David M. Goldenberg | 74099 |
| 425 | Plastic article or earthenware shaping or treating: apparatus | Xiao-Ping Wu | 3333 |
| 426 | Food or edible material: processes, compositions, and products | Kevin I. Segall | 13539 |
| 427 | Coating processes | Xinjian Lei | 13206 |
| 428 | Stock material or miscellaneous articles | Cheng-Shi Chen | 39366 |
| 429 | Chemistry: electrical current producing apparatus, product, and process | Je Young Kim | 26331 |
| 430 | Radiation imagery chemistry: process, composition, or product thereof | Jun Hatakeyama | 9609 |
| 431 | Combustion | Christopher A. Wiklof | 1684 |
| 432 | Heating | Koji Yoshii | 764 |
| 433 | Dentistry | Zachary B. Suttin | 5057 |
| 434 | Education and demonstration | Alberto Rodriguez | 5830 |
| 435 | Chemistry: molecular biology and microbiology | Marshall Medoff | 44607 |
| 436 | Chemistry: analytical and immunological testing | Andreas Bergmann | 5187 |
| 438 | Semiconductor device manufacturing: process | Shunpei Yamazaki | 31848 |
| 439 | Electrical connectors | Jerry Wu | 16096 |
| 440 | Marine propulsion | Daisuke Nakamura | 951 |
| 441 | Buoys, rafts, and aquatic devices | Tzong In Yeh | 735 |
| 442 | Fabric (woven, knitted, or nonwoven textile or cloth, etc.) | Martyn Douglas Wakeman | 2452 |
| 445 | Electric lamp or space discharge component or device manufacturing | Shou-Shan Fan | 790 |
| 446 | Amusement devices: toys | Robert H. Mimlitch, Iii | 2212 |
| 449 | Bee culture | Gene Probasco | 69 |
| 450 | Foundation garments | Zhen Qiang Liu | 580 |
| 451 | Abrading | Boguslaw A. Swedek | 3923 |
| 452 | Butchering | Adrianus Josephes Van Den Nieuwelaar | 523 |
| 453 | Coin handling | Robert Blythin | 116 |
| 454 | Ventilation | Dariusz Krakowski | 2260 |
| 455 | Telecommunications | Ahmadreza (reza) Rofougaran | 51617 |
| 460 | Crop threshing or separating | Herbert M. Farley | 343 |
| 462 | Books, strips, and leaves for manifolding | Karmichael Spiller | 3 |
| 463 | Amusement devices: games | Jay S. Walker | 14074 |
| 464 | Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts | Seung Tark Oh | 1093 |
| 470 | Threaded, headed fastener, or washer making: process and apparatus | Hiroshi Shinjo | 92 |
| 472 | Amusement devices | David W. Crawford | 500 |
| 473 | Games using tangible projectile | Michael J. Sullivan | 7750 |
| 474 | Endless belt power transmission systems or components | Yuji Kurematsu | 1791 |
| 475 | Planetary gear transmission systems or components | James M. Hart | 3411 |
| 476 | Friction gear transmission systems or components | Charles B. Lohr | 199 |
| 477 | Interrelated power delivery controls, including engine control | Alex O'Connor Gibson | 1895 |
| 482 | Exercise devices | William T. Dalebout | 4772 |
| 483 | Tool changing | Masahiro Murota | 186 |
| 492 | Roll or roller | Kazuhiro Yamauchi | 249 |
| 493 | Manufacturing container or tube from paper; or other manufacturing from a sheet or web | Thomas D. Wetsch | 1283 |
| 494 | Imperforate bowl: centrifugal separators | Peter Thorwid | 527 |
| 501 | Compositions: ceramic | Akio Koike | 1501 |
| 502 | Catalyst, solid sorbent, or support therefor: product or process of making | Zahra Nazarpoor | 3237 |
| 503 | Record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor | Gerhard Stork | 226 |
| 504 | Plant protecting and regulating compositions | Christopher Hugh Rosinger | 3559 |
| 505 | Superconductor technology: apparatus, material, process | Mark Stemmle | 842 |
| 506 | Combinatorial chemistry technology: method, library, apparatus | Mehdi Azimi | 10038 |
| 507 | Earth boring, well treating, and oil field chemistry | James B. Crews | 1407 |
| 508 | Solid anti-friction devices, materials therefor, lubricant or separant compositions for moving solid surfaces, and miscellaneous mineral oil compositions | Patrick E. Mosier | 2126 |
| 510 | Cleaning compositions for solid surfaces, auxiliary compositions therefor, or processes of preparing the compositions | Johan Smets | 3048 |
| 512 | Perfume compositions | Michael G. Monteleone | 170 |
| 514 | Drug, bio-affecting and body treating compositions | Anthony W. Czarnik | 69950 |
| 516 | Colloid systems and wetting agents; subcombinations thereof; processes of | Kalman Koczo | 199 |
| 518 | Chemistry: fischer-tropsch processes; or purification or recovery of products thereof | Kandaswamy Jothimurugesan | 747 |
| 520 | Synthetic resins or natural rubbers -- part of the class 520 series | Masahide Miyata | 1 |
| 521 | Synthetic resins or natural rubbers -- part of the class 520 series | Klaus Hahn | 2647 |
| 522 | Synthetic resins or natural rubbers -- part of the class 520 series | Orhun K. Muratoglu | 1127 |
| 523 | Synthetic resins or natural rubbers -- part of the class 520 series | Joachim E. Klee | 3046 |
| 524 | Synthetic resins or natural rubbers -- part of the class 520 series | Bernd Bruchmann | 11248 |
| 525 | Synthetic resins or natural rubbers -- part of the class 520 series | Steven Luo | 4703 |
| 526 | Synthetic resins or natural rubbers -- part of the class 520 series | Qing Yang | 3673 |
| 527 | Synthetic resins or natural rubbers -- part of the class 520 series | Wei-Peng Lin | 66 |
| 528 | Synthetic resins or natural rubbers -- part of the class 520 series | Scott D. Allen | 2766 |
| 530 | Chemistry: natural resins or derivatives; peptides or proteins; lignins or reaction products thereof | Kevin I. Segall | 4585 |
| 534 | Organic compounds -- part of the class 532-570 series | Eduardo Torres | 231 |
| 536 | Organic compounds -- part of the class 532-570 series | William Marshall | 2788 |
| 540 | Organic compounds -- part of the class 532-570 series | Jonathan S. Lindsey | 1018 |
| 544 | Organic compounds -- part of the class 532-570 series | Hideko Inoue | 2458 |
| 546 | Organic compounds -- part of the class 532-570 series | Gary L. Cantrell | 2469 |
| 548 | Organic compounds -- part of the class 532-570 series | Norbert Lui | 2106 |
| 549 | Organic compounds -- part of the class 532-570 series | Mesfin Ejerssa Janka | 2176 |
| 552 | Organic compounds -- part of the class 532-570 series | Robert M. Moriarty | 199 |
| 554 | Organic compounds -- part of the class 532-570 series | Surinder Pal Singh | 825 |
| 556 | Organic compounds -- part of the class 532-570 series | Ralf Karch | 947 |
| 558 | Organic compounds -- part of the class 532-570 series | Robert Baumann | 682 |
| 560 | Organic compounds -- part of the class 532-570 series | Eckhard Stroefer | 1389 |
| 562 | Organic compounds -- part of the class 532-570 series | Mark O. Scates | 1466 |
| 564 | Organic compounds -- part of the class 532-570 series | Johann-Peter Melder | 1163 |
| 568 | Organic compounds -- part of the class 532-570 series | Victor J. Johnston | 2376 |
| 570 | Organic compounds -- part of the class 532-570 series | Hsueh Sung Tung | 651 |
| 585 | Chemistry of hydrocarbon compounds | Christopher P. Nicholas | 3582 |
| 588 | Hazardous or toxic waste destruction or containment | Stephen J. Agace | 439 |
| 600 | Surgery | Roderick A. Hyde | 39688 |
| 601 | Surgery: kinesitherapy | Michael H. Slayton | 2660 |
| 602 | Surgery: splint, brace, or bandage | Arni Thor Ingimundarson | 2360 |
| 604 | Surgery | Christopher Brian Locke | 23990 |
| 606 | Surgery | Lutz Biedermann | 30374 |
| 607 | Surgery: light, thermal, and electrical application | Imad Libbus | 10512 |
| 623 | Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor | Anton G. Clifford | 14787 |
| 700 | Data processing: generic control systems or specific applications | Kyung Shik Roh | 19348 |
| 701 | Data processing: vehicles, navigation, and relative location | Anthony H. Heap | 30918 |
| 702 | Data processing: measuring, calibrating, or testing | Lowell L. Wood, Jr. | 17839 |
| 703 | Data processing: structural design, modeling, simulation, and emulation | Dorin Comaniciu | 7662 |
| 704 | Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression | Yang-Won Jung | 10953 |
| 705 | Data processing: financial, business practice, management, or cost/price determination | Royce A. Levien | 69938 |
| 706 | Data processing: artificial intelligence | Dharmendra S. Modha | 6797 |
| 707 | Data processing: database and file management or data structures | International Business Machines Corporation | 42611 |
| 708 | Electrical computers: arithmetic processing and calculating | David Raymond Lutz | 2112 |
| 709 | Electrical computers and digital processing systems: multicomputer data transferring | International Business Machines Corporation | 44824 |
| 710 | Electrical computers and digital data processing systems: input/output | Daniel F. Casper | 9042 |
| 711 | Electrical computers and digital processing systems: memory | Lokesh M. Gupta | 20017 |
| 712 | Electrical computers and digital processing systems: processing architectures and instruction processing (e.g., processors) | Michael K. Gschwind | 4765 |
| 713 | Electrical computers and digital processing systems: support | Vincent J. Zimmer | 20423 |
| 714 | Error detection/correction and fault detection/recovery | Lee D. Whetsel | 17593 |
| 715 | Data processing: presentation processing of document, operator interface processing, and screen saver display processing | Imran Chaudhri | 30709 |
| 716 | Data processing: design and analysis of circuit or semiconductor mask | Yi-Kan Cheng | 4909 |
| 717 | Data processing: software development, installation, and management | Cary L. Bates | 10323 |
| 718 | Electrical computers and digital processing systems: virtual machine task or process management or task management/control | International Business Machines Corporation | 7861 |
| 719 | Electrical computers and digital processing systems: interprogram communication or interprocess communication (ipc) | International Business Machines Corporation | 2909 |
| 720 | Dynamic optical information storage or retrieval | Jen-Chen Wu | 953 |
| 725 | Interactive video distribution systems | Jin Pil Kim | 13526 |
| 726 | Information security | Omer Tripp | 23556 |
| 800 | Multicellular living organisms and unmodified parts thereof and related processes | Gregory J. Holland | 10464 |
| 850 | Scanning-probe techniques or apparatus; applications of scanning-probe techniques, e.g., scanning probe microscopy [spm] | Roger Proksch | 1062 |
| 903 | Hybrid electric vehicles (hevs) | Joseph Akwo Tabe | 1 |
| PLT | Plants | Monica Maria Adelheid Sanders | 170 |
