TREA

Thomas W. Walczak

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  • Norfolk, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Replacement roof drain insert coupling
    • Patent number 5,141,633
    • Issue date Aug 25, 1992
    • Roof Accessories Company, Inc.
    • Thomas W. Walczak
    • E04 - BUILDING
  • Information Patent Grant

    Drain guard
    • Patent number 5,051,175
    • Issue date Sep 24, 1991
    • Roof Accessories, Inc.
    • Thomas W. Walczak
    • E04 - BUILDING