Patents by Inventor Fritz Schagen

Fritz Schagen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Windsurfer
    Patent number: 3996868
    Abstract: A wind-propelled surfboard or aquaplane having a hull assembled of several separable hull sections which are longitudinally clamped together by means of tensioning cables extending inside two horizontally spaced longitudinal spine tubes. These tubes are joined by means of connecting sleeves, for a torsion-resistant connection between the hull sections.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: December 14, 1976
    Assignee: Fa. Immobilien Commerce Estbl. Dr. Ivo Beck
    Inventor: Fritz Schagen