Electronic device with three movable layers
Electronic device with three movable layers
Electronic devices and casing constructions for such devices
Electronic devices and programming methods therefor
Electronic dialling keyboard for telephone sets with sending...
Electronic equipment mounting angle varying apparatus
Electronic exchange having a conference telephone...
Electronic external line repeater
Electronic hold and hold-release circuit for a telephone set...
Electronic hold circuit
Electronic hold release circuit
Electronic hybrid amplifier
Electronic hybrid circuit
Electronic impedance-matched line repeater
Electronic key telephone set with function operation test...
Electronic key telephone system
Electronic key telephone system
Electronic key telephone system
Electronic locating system for persons receiving telephone...
Electronic lock, switching, and hold devices for telephones