TREA

Douglas James Birkholz

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  • Madison, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bottle holder
    • Patent number D583903
    • Issue date Dec 30, 2008
    • S. C. Johnson & Son, Inc.
    • Evan A. Sparks
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Bottle holder
    • Patent number D581010
    • Issue date Nov 18, 2008
    • S. C. Johnson & Son, Inc.
    • Evan A. Sparks
    • D23 - Environmental heating and cooling