TREA

Douglas V. N. Powelson

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  • Audubon, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of joining plastic pipe
    • Patent number 4,043,857
    • Issue date Aug 23, 1977
    • Allied Chemical Corporation
    • Michael F. Byrne
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Method of joining plastic pipe
    • Patent number 3,961,814
    • Issue date Jun 8, 1976
    • Allied Chemical Corporation
    • Michael F. Byrne
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL