DIFF Subgroup
H01J 19/74 Cooling arrangements (cooling of anodes H01J19/36)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Cooling arrangements
CPC: Cooling arrangements (cooling of anodes H01J19/36)
Full Title
Full titles differ between systems:
IPC:
Details of vacuum tubes of the types covered by group > Cooling arrangements
CPC:
Details of vacuum tubes of the types covered by group H01J21/00 > Cooling arrangements (cooling of anodes H01J19/36)
No child classifications to compare. This is a leaf node in both IPC and CPC.