Patents by Inventor Willis R. Daft

Willis R. Daft 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).

  • Side-by-side tractor combination
    Patent number: 4053021
    Abstract: A pair of tractors are disposed in side-by-side relation, and are coupled by a single rigid link which may be reversed in position to vary the relative positioning of the tractors forwardly and rearwardly, to in turn determine the positioning of an implement carried by the tractors.
    Type: Grant
    Filed: April 8, 1976
    Date of Patent: October 11, 1977
    Assignee: Caterpillar Tractor Co.
    Inventors: James R. Sturges, Willis R. Daft