4. Pipe joints or couplings
  5. Flexible joint, rigid members
  6. Concrete, clay, or masonry pipe

Willi Keul

Inventor

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Plastic coupling sleeve for pipes

Pipe joints or couplings – Flexible joint – rigid members – Concrete – clay – or masonry pipe
Patent

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Well pipe

Wells – Conduit wall or specific conduit end structure
Reexamination Certificate

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Profile ID: LFUS-PAI-P-12478

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