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CPC Subgroup
H01J 19/22

Dispenser-type cathodes, e.g. L-cathode

Full Title

Details of vacuum tubes of the types covered by group H01J21/00 > Electron-emitting electrodes; Cathodes > Thermionic cathodes > Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment > Dispenser-type cathodes, e.g. L-cathode