Test initiation apparatus with continuous or pulse input
Testing coins
Testing device for fire detectors
The doggy doorbell
The edison alarm horn extension (for smoke detectors)
The life saving calendar
The life saving guard
The locator
The luminous safety glo-band
The signal
The silent security alarm
The sleep-fighter
Theft alarm activating absorbent pad
Theft alarms for motor vehicles
Theft and vandalism deterrent system
Theft detection apparatus using saturable magnetic targets
Theft detection method and apparatus in which the decay of a...
Theft detection system
Theft detection using a level monitoring system
Theft deterrent device