4. Pipe joints or couplings
  5. Particular interface
  6. Tapered

Kris L. Church

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Dual wall drill string assembly

Boring or penetrating the earth – With tool shaft detail
Reexamination Certificate

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Hang-free thread design

Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate

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Rotatable wedge cartridge valve mechanism and method for...

Fluid handling – Processes – Cleaning – repairing – or assembling
Reexamination Certificate

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Rotatable wedge valve mechanism and method for manufacture

Fluid handling – Processes – Cleaning – repairing – or assembling
Reexamination Certificate

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Thread form with multifacited flanks

Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2111738

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