Patents by Inventor Robert S. Cottriel

Robert S. Cottriel 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).

  • Wedge for tree harvesting having an improved drive head
    Patent number: 5290012
    Abstract: An improved wedge for the felling of trees. The wedge is of a synthetic material and has a metal insert integrally molded at its base or head end. The insert, which is molded flush with the head end of the wedge body receives the impacting blows of a driving tool and protects the head end of the wedge from damage. The insert integrally molded within the body of the wedge permits the wedge to be tapered along its full length.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: March 1, 1994
    Inventors: Robert S. Cottriel, Belt J. Shepherd, Larry M. Shepherd