Patents by Inventor Robert L. Shafer

Robert L. Shafer 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: 5016896
    Abstract: A double bed snowmobile trailer includes an axle assembly, trailer support wheels rotatably mounted to the axle assembly to rotate about a common axle axis, a pair of trailer beds each mounted to the axle assembly to pivot independently of the other about the common axle axis, a draw bar pivotally connected with respect to the middle of the axle assembly and extending forwardly in normal relation to a vertical plane including the common axle axis, and means to releasably fasten each of the trailer beds to the draw bar to prevent rotation of the trailer bed with respect to the draw bar when the trailer beds are in a substantially horizontal over-the-road snowmobile transport position.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: May 21, 1991
    Inventor: Robert L. Shafer