TREA

William G. Kellen

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  • Cora, WY, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Portable electronic bingo device
    • Patent number 7,118,477
    • Issue date Oct 10, 2006
    • Bettina Corp.
    • William G. Kellen
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Portable electronic bingo device
    • Patent number 6,645,072
    • Issue date Nov 11, 2003
    • Bettina Corporation
    • William G. Kellen
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Portable electronic bingo device
    • Patent number 5,967,895
    • Issue date Oct 19, 1999
    • Bettina Corporation
    • William G. Kellen
    • A63 - SPORTS GAMES AMUSEMENTS