TREA

U.S. Concrete Pipe Co.

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  • Cleveland, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    System for finishing pipes
    • Patent number 4,024,006
    • Issue date May 17, 1977
    • U.S. Concrete Pipe Co.
    • Paul E. Gray
    • B28 - WORKING CEMENT, CLAY, OR STONE