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PCE
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DIFF Subgroup
H01J 19/02

Electron-emitting electrodes; Cathodes

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of vacuum tubes of the types covered by group > Electron-emitting electrodes; Cathodes

CPC:

Details of vacuum tubes of the types covered by group H01J21/00 > Electron-emitting electrodes; Cathodes

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • H01J 19/24 Cold cathodes, e.g. field-emissive cathode IPC+CPC Available in IPC and CPC