4. Adhesive bonding and miscellaneous chemical manufacture
  5. Surface bonding means and/or assembly means therefor
  6. Longitudinally progressive helical winding means

Ralph S. Friedrich

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Abrasion resistant pipe

Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Reexamination Certificate

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Apparatus for winding fiber reinforced pipe fittings

Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Longitudinally progressive helical winding means
Patent

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Bonding of steel strips in steel strip laminate pipe

Pipes and tubular conduits – Distinct layers – Bonded to each other
Reexamination Certificate

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Closure for secondary containment pipe

Pipe joints or couplings – Having plural independent paths – For concentric tubes or pipes
Reexamination Certificate

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Double containment pipe mechanical joints

Pipe joints or couplings – Having plural independent paths – For concentric tubes or pipes
Patent

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Profile ID: LFUS-PAI-P-132460

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