Patents by Inventor Ludwig Hasenknopf

Ludwig Hasenknopf 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).

  • Abutment force adjustable windshield wiper arrangement
    Patent number: 4797601
    Abstract: A wiper arrangement for motor vehicles with a wiper arm that rests on the surface to be cleaned with an abutment force dependent on the vehicle velocity; the wiper arm thereby rests on the surface to be cleaned during non-wiper operation with a decreased abutment force compared to wiper operation and during a washing operation with an increased abutment force compared to wiper operation.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: January 10, 1989
    Assignee: Bayerische Motoren Werke AG
    Inventors: Erich Ditzer, Ludwig Hasenknopf