TREA

Douglas F. Prince

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Concrete product manufacturing system
    • Patent number 4,098,563
    • Issue date Jul 4, 1978
    • Castone Development Corporation
    • Douglas F. Prince
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Concrete product manufacturing system
    • Patent number 4,036,575
    • Issue date Jul 19, 1977
    • Castone Development Corporation
    • Douglas F. Prince
    • B28 - WORKING CEMENT, CLAY, OR STONE