TREA

Douglas R. Bolton

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  • Palatine, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Toss ball construction
    • Patent number 4,240,639
    • Issue date Dec 23, 1980
    • Cadaco, Inc.
    • Douglas R. Bolton
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Game device
    • Patent number 4,082,278
    • Issue date Apr 4, 1978
    • Cadaco, Inc.
    • Douglas R. Bolton
    • A63 - SPORTS GAMES AMUSEMENTS