Patents by Inventor Siegfried Unruh

Siegfried Unruh 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).

  • Patent number: D319589
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: September 3, 1991
    Assignee: Junghans Uhren GmbH
    Inventors: Siegfried Unruh, Ewald Kussmaul, Christian Frommherz