Patents by Inventor Robert L. Koehler

Robert L. Koehler 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).

  • Adjustable wrench
    Patent number: 4350063
    Abstract: A narrow band of a flexible, spring material is formed into a loop and has equally spaced, laterally extending slots threadedly engaged by a worm on a handle extending tangentially of the loop so that rotation of the handle adjusts the size of the loop.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: September 21, 1982
    Inventor: Robert L. Koehler