4. Valves and valve actuation
  5. Fluid actuated or retarded
  6. Pilot or servo type motor

Dennis M. Read

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Controlling activation of devices

Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Reexamination Certificate

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Curved flapper valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Reexamination Certificate

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Downhole valve

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate

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Emergency release tool

Wells – With explosive or gas generating means in well
Patent

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Fluid circulation apparatus

Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent

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Profile ID: LFUS-PAI-P-726731

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