TREA

Marvin H. Greenwood

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Recreational device having rings
    • Patent number 4,978,120
    • Issue date Dec 18, 1990
    • Marvin H. Greenwood
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Recreational device
    • Patent number 4,896,878
    • Issue date Jan 30, 1990
    • Marvin H. Greenwood
    • A63 - SPORTS GAMES AMUSEMENTS