Patents by Inventor Norbert Drusel

Norbert Drusel 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).

  • Supporting device for net posts in tennis courts
    Patent number: 4927142
    Abstract: A supporting device for the mounting of net posts for tennis nets on tennis courts comprises an alignable lever having elastic feet on its lower side. The feet extend flat over the ground of the court toward the horizontal stress created by tension in a net. A support structure is provided for the vertical mounting of a net post. The device has rollers, which are mounted eccentrically of a lever weighted portion and are freely rotatable.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: May 22, 1990
    Inventor: Norbert Drusel