TREA

Michael M. Szafranski

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  • Fairfax, VA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Automatic force generating and control system
    • Patent number 5,209,715
    • Issue date May 11, 1993
    • Walker Fitness Systems, Inc.
    • Christopher W. Walker
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Physical exerciser
    • Patent number D325610
    • Issue date Apr 21, 1992
    • Walker Fitness Systems, Inc.
    • Christopher W. Walker
    • D21 - Games, toys, and sports goods
  • Information Patent Grant

    Automatic force generating and control system
    • Patent number 5,058,888
    • Issue date Oct 22, 1991
    • Walker Fitness Systems, Inc.
    • Christopher W. Walker
    • A63 - SPORTS GAMES AMUSEMENTS