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Richard A. Rosthal

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Antenna structures for electromagnetic well logging tools

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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Apparatus and method for determining the resistivity of earth fo

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

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Apparatus and method for determining the resitivity of undergrou

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

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Apparatus and methods for determining isotropic and...

Communications: electrical – Wellbore telemetering or control
Reexamination Certificate

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Apparatus and methods for determining isotropic and...

Communications: electrical – Wellbore telemetering or control
Reexamination Certificate

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Profile ID: LFUS-PAI-P-364600

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