Electrical apparatus and method for reducing power consumption o

Electron beam generator for an electron gun

Electron current regulator for an electron discharge device

Electron emission device

Electron emitter assembly

Electron tube device and electron tube

Electronic ballast

Electronic ballast

Electronic ballast cathode heating circuit

Electronic ballast circuit for a fluorescent light

Electronic ballast circuit for fluorescent lamps which have a hi

Electronic ballast device for fluorescent lamps

Electronic ballast for tungsten lamp tubes

Electronic ballast with filament cut-out

Electronic ballast with reversely wound filament winding

Electronic ballast with separate inverter for cathode heating

Electronic ballast with two-step boost converter and method

Electronic device for the starting and a.c. voltage operation of

Electronic fluorescent lamp starter

Electronic igniter for fluorescent lamps