4. Electricity: measuring and testing
  5. Of geophysical surface or subsurface in situ
  6. By magnetic means

Nobuyoshi Niina

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Electromagnetic wellbore telemetry system for tubular strings

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate

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Electromagnetic wellbore telemetry system for tubular strings

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate

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Hole displacement measuring system and method using a...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – By magnetic means
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2779328

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