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Cable device for detecting and monitoring rock and soil...

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

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Carrierless amplitude and phase modulation telementry for use in

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

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Coil tubing string and downhole generator

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

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Communicating with an underground object

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

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Communication system for down hole use

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

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Communication system for down hole use

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

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Composite pipe telemetry conduit

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

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Conductor system for well bore data transmission

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

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Corrosion-resistant downhole transmission system

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

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