Arrangement of inductive couplers for data communication
Arrangement utilizing the mechanism of charge spreading to provi
Article detection system and method
Article detection system with near field electromagnetic wave co
Article dispenser
Article removal and pilferage detection system and apparatus
Article surveillance
Ash tray having fire protecting activity
Assembly for the transmission of control signals to and/or from
Assistive communication device
Association of support surfaces and beds
Association of support surfaces and beds
Attack dog security system
Attention getting sign
Audible alarm system for an electrical outlet
Audible-visual warning alarm system
Audio alarm signal initiation device
Audio and visual alarm device
Audio frequency power line control system
Audio-visual alarm device with translucent cover