TREA

Kenneth E. Griffin

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  • Lynnwood, WA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sign standard
    • Patent number 4,203,242
    • Issue date May 20, 1980
    • Kenneth E. Griffin
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Tunnel or like wall cleaning machine
    • Patent number 4,163,301
    • Issue date Aug 7, 1979
    • Kenneth E. Griffin
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES