Patents by Inventor Helmut Köstner

Helmut Köstner 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).

  • Cutting blade for a motor-driven, manually-guided implement
    Patent number: 7225713
    Abstract: A cutting blade for a motor-driven implement is provided. The cutting blade has a main body having a central fastening opening and blade sections that extend approximately radially from the main body. The blade sections have edges that extend in a radial direction and form cutting edges. Each blade section is provided with at least one bead-like embossment having a longitudinal axis that extends at an angle of between 0 and 45° relative to a longitudinal direction of the blade section.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: June 5, 2007
    Assignee: Andreas Stihl AG & Co.
    Inventors: Norbert Apfel, Roland Schierling, Helmut Köstner, Norbert Rehbein