Optical communications
Patent class list (only not empty are listed)
Deeper subclasses:
| Class / Patent application number | Description | Number of patent applications / Date published |
|---|---|---|
| 398043000 | MULTIPLEX | 3451 |
| 398009000 | DIAGNOSTIC TESTING | 1669 |
| 398140000 | TRANSMITTER AND RECEIVER SYSTEM | 701 |
| 398182000 | TRANSMITTER | 636 |
| 398115000 | HYBRID COMMUNICATION SYSTEM (E.G., OPTICAL AND RF) | 514 |
| 398202000 | RECEIVER | 472 |
| 398135000 | OPTICAL TRANSCEIVER | 467 |
| 398001000 | FAULT RECOVERY | 407 |
| 398118000 | OPTICAL COMMUNICATION OVER FREEE SPACE | 404 |
| 398106000 | REMOTE CONTROL | 164 |
| 398173000 | OPTICAL REPEATER SYSTEM | 39 |
| 398104000 | UNDERWATER | 38 |
| 398041000 | DUPLEX | 38 |
| 398132000 | PHOTOPHONE | 18 |
| 398039000 | INTERFERENCE SIGNAL TRANSMISSION OR ELIMINATION (E.G., JAMMING OR ANTIJAMMING) | 14 |
| 398040000 | EAVESDROPPING | 11 |