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Browse by Category: Main > Electrical & Energy |
| Class Number |
Class Name |
Patents |
| 330 |
Amplifiers |
39,355 |
| 236 |
Automatic temperature and humidity regulation |
9,471 |
| 136 |
Batteries: thermoelectric and photoelectric |
16,807 |
| 219 |
Electric heating |
98,582 |
| 313 |
Electric lamp and discharge devices |
74,686 |
| 314 |
Electric lamp and discharge devices: consumable electrodes |
67 |
| 315 |
Electric lamp and discharge devices: systems |
61,448 |
| 445 |
Electric lamp or space discharge component or device manufacturing |
9,742 |
| 363 |
Electric power conversion systems |
32,239 |
| 392 |
Electric resistance heating devices |
11,359 |
| 381 |
Electrical audio signal processing systems and devices |
46,444 |
| 439 |
Electrical connectors |
116,404 |
| 310 |
Electrical generator or motor structure |
88,743 |
| 377 |
Electrical pulse counters, pulse dividers, or shift registers: circuits and systems |
11,165 |
| 338 |
Electrical resistors |
16,219 |
| 307 |
Electrical transmission or interconnection systems |
28,897 |
| 320 |
Electricity: battery or capacitor charging or discharging |
20,717 |
| 200 |
Electricity: circuit makers and breakers |
41,672 |
| 174 |
Electricity: conductors and insulators |
69,418 |
| 361 |
Electricity: electrical systems and devices |
162,457 |
| 337 |
Electricity: electrothermally or thermally actuated switches |
10,097 |
| 335 |
Electricity: magnetically operated switches, magnets, and electromagnets |
22,001 |
| 324 |
Electricity: measuring and testing |
116,101 |
| 318 |
Electricity: motive power systems |
70,808 |
| 388 |
Electricity: motor control systems |
5,500 |
| 323 |
Electricity: power supply or regulation systems |
27,817 |
| 322 |
Electricity: single generator systems |
5,670 |
| 191 |
Electricity: transmission to vehicles |
1,670 |
| 399 |
Electrophotography |
74,350 |
| 110 |
Furnaces |
17,051 |
| 48 |
Gas: heating and illuminating |
9,359 |
| 165 |
Heat exchange |
57,871 |
| 432 |
Heating |
14,528 |
| 237 |
Heating systems |
4,320 |
| 218 |
High-voltage switches with arc preventing or extinguishing devices |
5,217 |
| 336 |
Inductor devices |
17,203 |
| 373 |
Industrial electric heating furnaces |
5,229 |
| D26 |
Lighting |
24,172 |
| 327 |
Miscellaneous active electrical nonlinear devices, circuits, and systems |
103,318 |
| 332 |
Modulators |
3,991 |
| 60 |
Power plants |
84,268 |
| 290 |
Prime-mover dynamo plants |
11,056 |
| 250 |
Radiant energy |
143,055 |
| 220 |
Receptacles |
66,346 |
| 333 |
Wave transmission lines and networks |
38,325 |
| 140 |
Wireworking |
2,917 | |
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