Optical fire detection system
Optical laser security system
Order communication system for restaurant
Order communication system for restaurant
Orientation responsive alarm system
Oscillator energized liquid level indicator
Output circuit of an ionization smoke sensor
Overload protection device
Overload safety device for telescopic cranes
Overtemperature monitor and integrator apparatus
Paper roll diameter sensing device for use with paper splicing a
Particulate products of combustion detector employing solid stat
Passive infrared room intrusion detector
Patient care and communication system
Patient care and communication system
Patient care timer
Patient monitor
Patient monitor integration into nurse call system and method
Patient signalling system
Patient/nurse call system