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David H. Hamm Jr.

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  • Rehoboth, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Security clutch with bent triggers
    • Patent number D488087
    • Issue date Apr 6, 2004
    • B. A. Ballou & Co., Inc.
    • David H. Hamm
    • D11 - Jewelry, symbolic insignia, and ornaments