Anisotropic pyrolytic graphite heater

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

Device having thermionic cathode heated by field-emitted electro

Electrode assembly, cathode device and plating apparatus...

Electrode assembly, cathode device and plating apparatus...

Electron gun with one directly heatable and one indirectly heata

Electron tube with pyrolytic graphite heating element

Fast warmup cathode and method of making same

Grid controlled electron source and method of making same

Heater coil for electron tube