DIFF Subgroup
G01V 3/20 operating with propagation of electric current
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation > specially adapted for well-logging > operating with propagation of electric current
CPC:
Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation > specially adapted for well-logging > operating with propagation of electric current
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
IPC defines codes here since 1980.
Child Classifications
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