4. Wells
  5. Valves, closures or changeable restrictors
  6. Fluid operated
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Pace Clare A.

Inventor

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Paschal, Jr. James H.

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Peetz Wolfgang

Inventor

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Petro-Design, Inc.

Corporate Assignee

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Petroline Wireline Services Ltd.

Corporate Assignee

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Petrowell Limited

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Phoenix Petroleum Services Limited

Corporate Assignee

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Pogue James B.

Inventor

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Polasek, Quisenberry & Errington

Law Firm

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Ponder Mack M.

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Poque James B.

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Pringle Ronald E.

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Pyne R. David G.

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Quantum Drilling Motors, Inc

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Rector, Jr. Clarence A.

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Reeves Wireline Technologies Ltd.

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Renovus Limited

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Rhodes R. David

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Ro Yong-Suk

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Robert Van Someren PC

Law Firm

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