Patents by Inventor Ernst Udo Ebert

Ernst Udo Ebert 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).

  • Method for manufacturing a file from a thin-walled tube
    Patent number: 3935756
    Abstract: A file of non-circular cross section is formed from a multiple helical pattern of teeth and then reshaping the tube internally using a shaping mandrel.
    Type: Grant
    Filed: January 15, 1975
    Date of Patent: February 3, 1976
    Assignee: Firma August Ruggeberg
    Inventor: Ernst Udo Ebert