4. Wells
  5. Valves, closures or changeable restrictors

Polasek, Quisenberry & Errington, L.L.P.

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Centrifugally-cast tube and related method and apparatus for...

Pipes and tubular conduits – Structure
Reexamination Certificate

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Downhole multiplexer and related methods

Wells – Valves – closures or changeable restrictors
Reexamination Certificate

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Method for storing and retrieving data objects

Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate

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Subsurface safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2554144

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