Patents by Inventor Josef Serf

Josef Serf 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).

  • Multiple-speed, hydrokinetic transmission
    Patent number: 4649763
    Abstract: Multiple-speed, hydrokinetic-mechanical change-speed gearbox controlled by an hydraulic control valve system for a motor vehicle comprising multiple ratio gearing and a simple planetary gear unit located between the hydrokinetic portion and the multiple ratio gearing.
    Type: Grant
    Filed: May 8, 1985
    Date of Patent: March 17, 1987
    Assignee: Ford Motor Company
    Inventors: Kurt Graef, Egon Axt, Hans-Peter Wirtz, Friedrich Lauscher, Werner Potzsch, Peter Korfer, Paulus Sastrarahardja, Werner Croonen, Josef Serf