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PCE
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DIFF Subgroup
H01J 29/56

Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of cathode-ray tubes or of electron-beam tubes of the types covered by group > Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement > Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses

CPC:

Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00 > Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement > Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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