DIFF Subgroup
H01J 29/84 Arrangements for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection
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 for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection
CPC:
Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00 > Arrangements for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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