Transmitters Patents (Class 375/295)
- Remote controlled (Class 375/310)
- Automatic (Class 375/311)
- Power or bias voltage supply keying (Class 375/312)
- Key shock or click prevention (Class 375/313)
- Including auxiliary control tube (Class 375/314)
- Modulation by absorption of signal, changing antenna dimension or changing antenna impedance (Class 375/315)