Remote electric state tester
Remote personnel station alarm system
Restaurant service management system
Restaurant service management system
Restaurant table turn system network
Restaurant waiter paging system
Retail service/server annunciator/pager, centerpiece and system
Retail service/server annunciator/pager, centerpiece and system
Room status signaling system
Route mapping device
Safety system for cranes
Security alarm system
Security device
Security glazing and alarm system
Security system employing radio transmitter and receiver
Security system with plural sensors connected in parallel across
Self timing switch
Self-contained fire detector with interconnection circuitry
Self-contained, condition responsive circuit
Self-powered system for measuring and storing consumption of uti