- Radio broadcasting and communications equipment (9)
- Pagers (one-way) (1)
- Radio receiver networks (1)
- Receivers, radio communications (1)
- Television closed circuit equipment (1)
- Antennas, transmitting and communications (4)
- Digital encoders (1)
- Encryption devices (1)
- Light communications equipment (1)
- Microwave communication equipment (1)
- Satellites, communications (4)
- Space satellite communications equipment (1)
- Transmitting apparatus, radio or television (2)
- Global positioning systems (gps) equipment (1)
