Mercury vapor discharge device
Metal cathode for electron tube
Method and apparatus for producing an electron beam from a therm
Method and apparatus for use with an electron gun employing...
Method of manufacturing a thermionic cathode and thermionic cath
Method of manufacturing integral shadow gridded controlled poros
Method of preparing an impregnated cathode with an enhanced ther
Method of providing electrical contact to a semiconductor cathod
Methods of manufacturing a dispenser cathode and dispenser catho
Multiple layer composite electrodes for discharge lamps and low