4. Pipe joints or couplings
  5. With fluid pressure seal
  6. Wedged gasket

Charles A. Bollfrass

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Elastomeric guard seal for tubular connections

Pipe joints or couplings – With fluid pressure seal – Wedged gasket
Patent

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Method and apparatus for forming a ventable seal

Pipe joints or couplings – With fluid pressure seal – Wedged gasket
Patent

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Systems and methods for allowing underwater escape from a...

Ships – Submersible device – Detachably connected to a main vessel
Reexamination Certificate

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Threaded connector

Pipe joints or couplings – Particular interface – Tapered
Patent

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Threaded pipe connection

Pipe joints or couplings – Temperature-responsive
Patent

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Profile ID: LFUS-PAI-P-746325

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