TREA

Daniel H. Seifert

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  • Walnut Creek, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hand-held electronic game
    • Patent number 6,142,869
    • Issue date Nov 7, 2000
    • Hasbro, Inc.
    • Karl R. Meyer
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Game apparatus
    • Patent number D423601
    • Issue date Apr 25, 2000
    • Hasbro, Inc.
    • Daniel H. Seifert
    • D21 - Games, toys, and sports goods