4. Communications: electrical
  5. Wellbore telemetering or control
  6. Using a specific transmission medium

Gregson William Martin Spring

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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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Downhole torque generator

Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate

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Downhole torque-generating and generator combination apparatus

Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2395850

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