One piece astigmatic grid for color picture tube electron gun
Oxidation resistant impregnated cathode
Oxide cathode
Oxide cathode
Oxide cathode
Oxide cathode
Oxide cathode
Oxide cathode employing Ba evaporation restraining layer
Oxide cathode for an electron gun, having a denser and...
Oxide cathode for electron gun with a differentially doped...
Oxide cathode with rare earth addition
Oxide-coated cathode and method for making same
Oxide-coated cathode and method of producing the same
Oxide-coated cathode for CRT and manufacturing method thereof