Fail-safe switch which renders HID lamp inoperative upon breakag

Field emission electron gun

Field emission gun improvement

Filament lamp for wafer heating and heating light source

Filament shunt member for decorative lamp

Filament switching device

Filter device for high frequency generating device

Flash lamp

Flash lamp and circuitry for use with an incandescent light

Flashing and sound generating lamp

Flashlamp triggering arrangements for pressurized gas cooled las

Flashlight with boost feature

Flat light source

Flat panel field emission display apparatus

Flesh illuminating device

Flourescent lamp for recessed ceiling mounting

Flourescent lamp whose ballast has an output power that is...

Fluid-cooled dielectric window for a plasma system

Fluorescent apparatus and method employing low-frequency excitat

Fluorescent bulb with impact-absorbing sleeve