DIFF Subgroup
H01T 13/50 having means for ionisation of gap (H01T13/52 takes precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: having means for ionisation of gap
CPC: having means for ionisation of gap (H01T13/52 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Sparking plugs > having means for ionisation of gap
CPC:
Sparking plugs > having means for ionisation of gap (H01T13/52 takes precedence)
No child classifications to compare. This is a leaf node in both IPC and CPC.