Two-tiered communication security employing asymmetric session k
Two-tone decoder having high noise immunity
Two-way FM radio system operating on a single channel and provid
Ultra stable frequency distribution system
Ultrasound imaging preferable to ultrasound contrast echography
Unidirectional phase shift keyed communication system
Uniform permutation privacy system
Variable spot size scanning system
Variant key matrix cipher system
Variant key matrix cipher system
Vehicle simulator binocular multiplanar visual display system
Video ground-based flight simulation apparatus
Videotelephone system with centralized synchronization control
Voice security method and system
Walsh function signal scrambler
Wired broadcasting systems