4. Wells
  5. Valves, closures or changeable restrictors
  6. Longitudinally movable operator

William W. Chapman

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Method and apparatus for stimulating hydrocarbon wells

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Method and apparatus for stimulating hydrocarbon wells

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

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Profile ID: LFUS-PAI-P-3121890

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