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Joel R. Hartman

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  • Kennewick, WA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bicycle drop-out and method of attachment
    • Patent number 5,025,977
    • Issue date Jun 25, 1991
    • Sandvik Special Metals Corporation
    • Joel R. Hartman
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...