TREA

Calmar International, Inc.

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  • Oakland, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Form for casting stepped openings
    • Patent number 4,159,098
    • Issue date Jun 26, 1979
    • Calmar International, Inc.
    • John B. Wong
    • B28 - WORKING CEMENT, CLAY, OR STONE