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PCE
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DIFF Subgroup
G01V 1/08

involving time-delay devices

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Seismology; Seismic or acoustic prospecting or detecting > Generating seismic energy > Details > Ignition devices > involving time-delay devices

CPC:

Seismology; Seismic or acoustic prospecting or detecting > Generating seismic energy > Details > Ignition devices (G01V1/393 takes precedence) > involving time-delay devices

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