Patents by Inventor Bertil Stapel

Bertil Stapel 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).

  • File for filing the cutting tooth of a saw chain
    Patent number: 11007589
    Abstract: The disclosure relates to a file for filing a saw tooth of a saw chain. The file includes a file body defining a circumferential direction and a circumference. The file body, in a cross section, has an unhewn guide surface and a file surface adjoining the unhewn guide surface in the circumferential direction. The unhewn guide surface extends over at least ? of the circumference in the cross section.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: May 18, 2021
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Thomas Lux, Friedrich Hollmeier, Georg Maier, Bertil Stapel, Tobias Grams, Norbert Althoff
  • FILE FOR FILING THE CUTTING TOOTH OF A SAW CHAIN
    Publication number: 20200030898
    Abstract: The disclosure relates to a file for filing a saw tooth of a saw chain. The file includes a file body defining a circumferential direction and a circumference. The file body, in a cross section, has an unhewn guide surface and a file surface adjoining the unhewn guide surface in the circumferential direction. The unhewn guide surface extends over at least ? of the circumference in the cross section.
    Type: Application
    Filed: September 30, 2019
    Publication date: January 30, 2020
    Inventors: Thomas Lux, Friedrich Hollmeier, Georg Maier, Bertil Stapel, Tobias Grams, Norbert Althoff