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PCE
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DIFF Subgroup
G01V 1/147

using impact of dropping masses

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Seismology; Seismic or acoustic prospecting or detecting > Generating seismic energy > using mechanical driving means > using impact of dropping masses

CPC:

Seismology; Seismic or acoustic prospecting or detecting > Generating seismic energy > using mechanical driving means (G01V1/104, G01V1/133 take precedence) > using impact of dropping masses

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