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
Secure SCA broadcasting system including subscriber actuated por
Security system and method for securely communicating therein
Security system for SSTV encryption
Selection system for digital signal repeaters
Self-synchronizing descrambler
Sensor magnifying glass apparatus
Serial pulse-code-modulated retiming system
Signal playback system transducer with optical resonance cavity