Aeronautics and astronautics
Patent class list (only not empty are listed)
Deeper subclasses:
| Class / Patent application number | Description | Number of patent applications / Date published |
|---|---|---|
| 244117000 | AIRCRAFT STRUCTURE | 2118 |
| 244004000 | AIRCRAFT, HEAVIER-THAN-AIR | 772 |
| 244034000 | AIRCRAFT SUSTENTATION | 625 |
| 244750100 | AIRCRAFT CONTROL | 526 |
| 244158100 | SPACECRAFT | 508 |
| 244053000 | AIRCRAFT POWER PLANTS | 464 |
| 244100000 | LANDING GEAR | 319 |
| 244300100 | MISSILE STABILIZATION OR TRAJECTORY CONTROL | 296 |
| 244001000 | MISCELLANEOUS | 221 |
| 244050000 | AIRCRAFT PROPULSION AND STEERING ON LAND OR WATER | 137 |
| 244024000 | AIRCRAFT, LIGHTER-THAN-AIR | 127 |
| 244138000 | SAFETY LOWERING DEVICES | 103 |
| 244002000 | COMPOSITE AIRCRAFT | 100 |
| 244110000 | RETARDING AND RESTRAINING DEVICES | 100 |
| 244062000 | AIRCRAFT PROPULSION | 99 |
| 244114000 | LANDING FIELD ARRANGEMENT | 57 |
| 244153000 | KITES | 54 |
| 244051000 | AIRCRAFT, STEERING PROPULSION | 12 |