Patents by Inventor Rolf Bierwirth

Rolf Bierwirth 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).

  • Golfcart with battery driven drive assist
    Patent number: 4615406
    Abstract: A golf cart with battery-operated auxiliary drive is composed of a hand golf cart and a tractor apparatus, which are both releasably coupled together by a connecting element.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: October 7, 1986
    Inventors: Karl Bottenschein, Rolf Bierwirth