TREA

Harold V. Swanson

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  • Sparta, NJ, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Concrete pipe machine
    • Patent number 4,600,373
    • Issue date Jul 15, 1986
    • GHA Lock Joint, Inc.
    • Harold V. Swanson
    • B28 - WORKING CEMENT, CLAY, OR STONE