Patents by Inventor John D. Chang

John D. Chang 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).

  • Ski base and running surface
    Patent number: 5344177
    Abstract: A ski base sheet and ski body are disclosed. The ski base sheet is removable from the ski body and reusable. The ski base sheet is attached to the ski body by using a structured surface. A number of different ski base sheets may be used interchangably on the ski body.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: September 6, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Forrest J. Rouser, John D. Chang, Mark E. Reeves