Remote control apparatus for channel selector
Remote control systems for telecommunications links
Remote disconnect-reconnect tap for cable television systems
Remote supply system for a cable transmission line with repeater
Remote television control
Remote transceiver for a multiple site location in a two-way cab
Remote unit for a two-way cable communications system
RSA Public-key data encryption system having large random prime
Satellite communications transmission apparatus and method
Scanning devices
Scanning devices
Scrambler and unscrambler for serial data
Scrambler key code synchronizer
Secrecy system
Secret communication system
Secure communication system
Secure communication system with remote key setting
Secure communications system
Secure facsimile transmission system using time-delay modulation
Secure microprocessor