TREA

Murray B. Calvert

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  • London, Ontario, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pentagonal game equipment
    • Patent number 4,357,018
    • Issue date Nov 2, 1982
    • Murray B. Calvert
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Pentagonal puzzle
    • Patent number 4,343,471
    • Issue date Aug 10, 1982
    • Murray B. Calvert
    • A63 - SPORTS GAMES AMUSEMENTS