Ceiling mount light with 360-degree motion sensor
Ceiling mount microwave transceiver with 360 degree...
Ceiling mounted passive infrared intrusion detector with...
Cellular messaging alert method and system
Central monitor for home security system
Central station alarm system
Central station monitoring with real-time status and control
Central station system including alternative signal path...
Central test radio frequency system for emergency lighting
Centralized monitoring system for gas leakage
Character generator apparatus
Checking device for use in hotel refrigerators and other...
Chemically activated warning system
Child carseat alert system
Child locator system
Child occupancy detection system
Chime alarm apparatus
Chimney fire alarm device
Chinese character display pager
Circuit and method for prioritization of hazardous condition...