4. Measuring, testing, or signalling instruments
  5. Measuring, regulating or indicating instrument, or casing
  6. Electrical property

H. David Procter-Gregg

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Passive geophysical exploration device

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent

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Passive geophysical prospection system based upon the detection

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent

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Profile ID: LFUS-PAI-P-313414

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