Cathode
Cathode arrangement for an X-ray tube
Cathode for electron tube
Cathode heater assembly for electron discharge device
Cathode ray tube having an improved heater
Cathode structure and method
Cathode structure for color cathode ray tube
Cathode structure including barrier for preventing metal...
Cathode structure of electron tube
Cathode-heater assembly and support structure therefor
Cold electrode for gas discharges