Electron gun and electron beam exposure device

Electronic tube with cylindrical electrodes

Emissive filament and support structure

Energy converter and light source

Field emission type electron gun

Filament for X-ray tube and X-ray tube having the same

Flat circular foil-filament lamp

Fluorescent display device including a filamentary cathode with

Heater for indirect-heated cathode

Heater for indirectly-heated cathode

High emissivity filament for energy conserving incandescent lamp

Improving incandescent bulb efficiency

Incandescent bulb and incandescent bulb filament

Incandescent bulb for a motor vehicle

Incandescent lamp filament incorporating hafnium

Incandescent lamp filament with surface crystallites and method

Incandescent light bulb with variable pitch coiled filament

Indirectly heated electrode for gas discharge tube

Lamp filament structure, and method of its manufacture

Lamp with IR suppressing composite