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DIFF Subgroup
H01J 19/52

without fixed connection between spacing member and envelope

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of vacuum tubes of the types covered by group > Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies > Spacing members extending to the envelope > without fixed connection between spacing member and envelope

CPC:

Details of vacuum tubes of the types covered by group H01J21/00 > Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies > Spacing members extending to the envelope > without fixed connection between spacing member and envelope

No child classifications to compare. This is a leaf node in both IPC and CPC.