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Browse by Category: Main > Electrical & Energy |
| Class Number |
Class Name |
Patents |
| 330 |
Amplifiers |
33,291 |
| 236 |
Automatic temperature and humidity regulation |
8,281 |
| 136 |
Batteries: thermoelectric and photoelectric |
12,780 |
| 219 |
Electric heating |
88,074 |
| 313 |
Electric lamp and discharge devices |
59,902 |
| 314 |
Electric lamp and discharge devices: consumable electrodes |
53 |
| 315 |
Electric lamp and discharge devices: systems |
49,506 |
| 445 |
Electric lamp or space discharge component or device manufacturing |
7,839 |
| 363 |
Electric power conversion systems |
26,147 |
| 392 |
Electric resistance heating devices |
9,944 |
| 381 |
Electrical audio signal processing systems and devices |
29,863 |
| 439 |
Electrical connectors |
100,434 |
| 310 |
Electrical generator or motor structure |
72,841 |
| 377 |
Electrical pulse counters, pulse dividers, or shift registers: circuits and systems |
10,137 |
| 338 |
Electrical resistors |
15,090 |
| 307 |
Electrical transmission or interconnection systems |
23,152 |
| 320 |
Electricity: battery or capacitor charging or discharging |
12,960 |
| 200 |
Electricity: circuit makers and breakers |
37,885 |
| 174 |
Electricity: conductors and insulators |
58,172 |
| 361 |
Electricity: electrical systems and devices |
126,870 |
| 337 |
Electricity: electrothermally or thermally actuated switches |
9,136 |
| 335 |
Electricity: magnetically operated switches, magnets, and electromagnets |
18,621 |
| 324 |
Electricity: measuring and testing |
97,820 |
| 318 |
Electricity: motive power systems |
59,286 |
| 388 |
Electricity: motor control systems |
5,186 |
| 323 |
Electricity: power supply or regulation systems |
21,247 |
| 322 |
Electricity: single generator systems |
4,926 |
| 191 |
Electricity: transmission to vehicles |
1,499 |
| 399 |
Electrophotography |
55,371 |
| 110 |
Furnaces |
16,022 |
| 48 |
Gas: heating and illuminating |
7,504 |
| 165 |
Heat exchange |
50,689 |
| 432 |
Heating |
13,879 |
| 237 |
Heating systems |
3,956 |
| 218 |
High-voltage switches with arc preventing or extinguishing devices |
4,545 |
| 336 |
Inductor devices |
13,751 |
| 373 |
Industrial electric heating furnaces |
4,988 |
| D26 |
Lighting |
19,046 |
| 327 |
Miscellaneous active electrical nonlinear devices, circuits, and systems |
86,566 |
| 332 |
Modulators |
3,301 |
| 60 |
Power plants |
67,616 |
| 290 |
Prime-mover dynamo plants |
8,036 |
| 250 |
Radiant energy |
119,582 |
| 220 |
Receptacles |
57,024 |
| 333 |
Wave transmission lines and networks |
33,257 |
| 140 |
Wireworking |
2,748 | |
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