DIFF Subgroup
H01J 3/40 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
Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps > Arrangements for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection
No child classifications to compare. This is a leaf node in both IPC and CPC.