4. Seal for a joint or juncture
  5. Seal between relatively movable parts
  6. Circumferential contact seal for other than piston

John W. Schroeder

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Rotary fluid-sealing structure using speed-reduction stages

Wells – Above ground apparatus – With seal for reciprocating member
Reexamination Certificate

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Self-contained anti-blowout seal for fluids or gases

Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2680519

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