Apparatus for the optional detection of the movement of any indi

Apparatus for the transmission of information in a restaurant

Apparatus for warning of the failure of a sump pump

Apparatus indicating an absent golf club

Appliance alarm device

Appliance removal alarm system for motels

Arrangement for detecting relative angular movement of a steerin

Arrangement for detecting the presence of snow, ice and other fr

Arrangement for testing an alarm system and method

Article detection system and method

Article detection system with near field electromagnetic wave co

Article removal and pilferage detection system and apparatus

Article surveillance

Assistive communication device

Association of support surfaces and beds

Association of support surfaces and beds

Attack dog security system

Audible alarm system for an electrical outlet

Audible-visual warning alarm system

Aural-visual product display