Patents by Inventor Duane O. Klindworth

Duane O. Klindworth 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).

  • Patent number: 4191260
    Abstract: A center towing hitch section including five side-by-side wing hitch sections disposed to each of the opposite sides of the center hitch section. Adjacent marginal portions of the hitch sections are pivotally connected and the first wing sections may be swung upwardly into upstanding positions overlying the adjacent sides of the center section. The second wing sections are swingable upwardly and inwardly into inverted superposed positions over the first wing sections and the third wing sections are swingable into juxtaposition with the second sections and the undersides of the second and third sections opposing each other. The fourth sections are swingable into inverted superposed positions relative to the third sections and the fifth wing sections are swingable into juxtaposition with the fourth sections and the undersides of the fourth and fifth sections opposing each other.
    Type: Grant
    Filed: March 15, 1978
    Date of Patent: March 4, 1980
    Inventor: Duane O. Klindworth