Cellular telephone advertising system
Cellular telephone alarm
Cellular telephone safety system
Cellular telephone safety system
Cellular telephone system that uses position of a mobile unit to
Combination cordless telephone and premise-monitoring alarm syst
Combination emergency phone and personal audio device
Combined global positioning system receiver and radio
Communication device
Communication device and method of providing location...
Communication system and method for mobile and stationary...
Communication system for tracking assets
Communication system for tracking assets
Communication system for working machines
Communication system that provides backup communication...
Communications device for a protective helmet
Communications restrictions for mobile group communication...
Completing emergency calls over a network with a...
Control and messaging during emergency calls
Cooperative element location system