TREA

Hans Woitschatzke

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  • Grunwald, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ski and its manufacture
    • Patent number 4,313,614
    • Issue date Feb 2, 1982
    • Trak Incorporated
    • Hans Woitschatzke
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Ski with improved three-dimensional running surface
    • Patent number 4,223,909
    • Issue date Sep 23, 1980
    • Trak Incorporated
    • William D. Danner
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Ski with three-dimensional running surface
    • Patent number 4,178,012
    • Issue date Dec 11, 1979
    • Trak Incorporated
    • Walter Roth
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Ski brake
    • Patent number 4,109,931
    • Issue date Aug 29, 1978
    • Trak Sportartikel GmbH
    • Hans Woitschatzke
    • A63 - SPORTS GAMES AMUSEMENTS