Electron gun cathode with a metal layer having a recess

Electron gun for a cathode-ray tube for image display having an

Electron gun for cathode tube

Electron gun having a grid

Electron source of a single crystal of lanthanum hexaboride emit

Electron tube cathode

Electron tube cathode

Electron tube cathode

Electron tube cathode

Electron tube cathode

Electron tube including a cathode having an electron emissive ma

Electron tube with dispenser cathode

Electronic element

Emissive coating for electrodes

Emitter material for cathode ray tube having at least one...

Fast heating cathode

Fast warm up picture tube cathode cap having high heat emissivit

Ferroelectric emitter

Field emission device

Heating element for indirectly heated cathode and method for the