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PCE
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DIFF Subgroup
H01J 1/52

Screens for shielding; Guides for influencing the discharge; Masks interposed in the electron stream

Introduced: September 1968

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 > Screens for shielding; Guides for influencing the discharge; Masks interposed in the electron stream

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) > Screens for shielding; Guides for influencing the discharge; Masks interposed in the electron stream

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