TREA

Michael R. Johnston

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  • Savage, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Aerobic ski exerciser
    • Patent number D425940
    • Issue date May 30, 2000
    • Joseph A. Halfen
    • D21 - Games, toys, and sports goods
  • Information Patent Grant

    Variable incline folding exerciser
    • Patent number 5,830,114
    • Issue date Nov 3, 1998
    • NordicTrack, Inc.
    • Joseph A. Halfen
    • A63 - SPORTS GAMES AMUSEMENTS