Table accessory for signaling that service is required
Tabletop signaling device for restaurants
Talking door sentinel
Telemetry alarm system
Temperature indicating device for fluids
Temperature sensor that is non-responsive to transient condition
Temperature-responsive alarm control circuit
Theft alarm
Theft alarm for portable articles
Theft detection system
Theft deterring apparatus
Thermal discriminator for sensing variations in the heat exchang
Three wire detection circuit
Time based monitoring system
Touch controlled switch assembly
Touch-responsive portable intrusion alarm
Trace locator for a multi-trace recorder
Trailer angular direction sensor and indicator
Transducer for converting a varying reactance signal to a DC cur
Transformer hot spot detection system