Ultrasonic data communication system
Ultrasonic power sensory system
Ultrasonic proximity switch with a synchronizing device
Ultrasonic shelf label method and apparatus
Unattended item delivery system
Unauthorized utility use monitor apparatus and method
Underbody and adjacent lighting for automotive vehicle
Uneven token distribution technique for token based local area n
Uni-directional protocol
Unidirectional telemetry system
Universal garage door opener
Universal generator interface module
Universal interface for remotely-monitored security systems
Universal paging device with power conservation
Universal pressure measurement interface
Universal remote control including quick touch function
Universal remote control method and apparatus
Universal remote control program scheduling system
Universal remote control system
Universal remote control system