TREA

Alan Roy Mattlage

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  • Takoma Park, MD, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Circular chess system
    • Patent number 6,592,123
    • Issue date Jul 15, 2003
    • Alan Roy Mattlage
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Circular chess board
    • Patent number D456456
    • Issue date Apr 30, 2002
    • Alan Roy Mattlage
    • D21 - Games, toys, and sports goods