2-wire optovoltaic loop-powered isolation amplifier with current
A.C. powered detecting device with battery backup
Abnormality detection method and protection apparatus
Access control and security alarm apparatus and method
Access control system wireless transmission link test method
Acoustic alert communication system with enhanced signal to...
Acoustic anti-tampering detector
Action control process of security alarm system
Active entry delay device
Active object identification and data collection
Active security system
Active supervision of motion-detection systems
Adaptive message display apparatus
Address setting means for fire detectors
Address setting means for fire detectors
Addressable devices with interface modules having electrically r
Addressable location indicator apparatus and method
Adverse condition detector having modulated test signal
Alarm alerting method and apparatus
Alarm analysis tools method and apparatus