TREA

Edward L. Duran

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  • Santa Fe, NM, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ultrasonic drilling apparatus
    • Patent number 4,828,052
    • Issue date May 9, 1989
    • The United States of America as represented by the United States Department o...
    • Edward L. Duran
    • B28 - WORKING CEMENT, CLAY, OR STONE