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PCE
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DIFF Subgroup
F02P 15/04

one of the spark electrodes being mounted on the engine working piston

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Electric spark ignition having characteristics not provided for in, or of interest apart from, groups > one of the spark electrodes being mounted on the engine working piston

CPC:

Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 > one of the spark electrodes being mounted on the engine working piston

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