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

Howard C. Hopkins

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Pipe connection

Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate

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Seam-welded metal pipe and method of making the same without...

Metal fusion bonding – Process – With subsequent treating other than heating of bonded parts...
Reexamination Certificate

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