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PCE
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DIFF Subgroup
H01J 1/34

Photo-emissive cathodes (H01J1/35 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Photo-emissive cathodes

CPC: Photo-emissive cathodes (H01J1/35 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps > Main electrodes > Photo-emissive cathodes

CPC:

Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical or ion-optical arrangements H01J3/00) > Main electrodes > Photo-emissive cathodes (H01J1/35 takes precedence)

No child classifications to compare. This is a leaf node in both IPC and CPC.