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Robert H. Youngren

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  • Rockford, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hammer
    • Patent number D540646
    • Issue date Apr 17, 2007
    • Estwing Manufacturing Company
    • Robert H. Youngren
    • D08 - Tools and hardware
  • Information Patent Grant

    Hammer
    • Patent number D521342
    • Issue date May 23, 2006
    • Estwing Manufacturing Company
    • Robert H. Youngren
    • D08 - Tools and hardware