Patents by Inventor Wolf Dietrich Hoffman

Wolf Dietrich Hoffman 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).

  • Wiper arm having a curved wiper arm body
    Patent number: 6212730
    Abstract: A wiper arm for wiping vehicle's windows and having an essentially oblong wiper arm body. The wiper arm body has essentially, along its whole length, a cross-sectional shape which has a first curvature facing the window and a second curvature facing away from the window. The second curvature being smaller than the first curvature.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: April 10, 2001
    Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbH
    Inventors: Hanswerner Kalbas, Wolf Dietrich Hoffman