TREA

Jacob C. Barnhardt Jr.

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  • Mount Airy, NC, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Insulating building block
    • Patent number 4,002,002
    • Issue date Jan 11, 1977
    • Jacob C. Barnhardt
    • B28 - WORKING CEMENT, CLAY, OR STONE