DIFF Subgroup
H01J 19/40 Screens for shielding
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Details of vacuum tubes of the types covered by group > Non-electron-emitting electrodes; Screens > Screens for shielding
CPC:
Details of vacuum tubes of the types covered by group H01J21/00 > Non-electron-emitting electrodes; Screens > Screens for shielding
No child classifications to compare. This is a leaf node in both IPC and CPC.