Patents by Inventor Donald E. Winterfeld

Donald E. Winterfeld 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).

  • Turn signal apparatus
    Patent number: 4801917
    Abstract: Signaling apparatus for use in conjunction with agricultural vehicles. A plurality of signaling devices are magnetically securable to a drawn vehicle such as a trailer and are controlled by a remote-control switching device. The signaling devices are formed with permanent magnets upon a rearward facing surface enabling the signaling apparatus to be readily repositioned upon a variety of utility vehicles.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: January 31, 1989
    Inventor: Donald E. Winterfeld