Patents by Inventor Karl Wiedner

Karl Wiedner 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).

  • Drill
    Patent number: 4948306
    Abstract: A drill has a solid material shank (10), which is provided in its front region with a cold-forged drill point (11) with two cutting edges (12) approximately parallel to one another in projection and two flutes (13) running approximately in the longitudinal direction of the shank (10).
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: August 14, 1990
    Assignee: Aldof Wurth GmbH & Co. KG
    Inventors: Karl Wiedner, Katsumi Shinjo