H01J 3/12 Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses (H01J3/02, H01J3/04 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
CPC: Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses (H01J3/02, H01J3/04 take precedence)
Full Title
Full titles differ between systems:
Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps > Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps > Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses (H01J3/02, H01J3/04 take precedence)
No child classifications to compare. This is a leaf node in both IPC and CPC.