Patents by Inventor John J. Doubt

John J. Doubt 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).

  • Golfer's combination tool
    Patent number: 4007928
    Abstract: A combination tool for use by golfers which serves as a shoe horn and a divot repair device. In addition the tool can serve as a prop for a club which the golfer desires to lay aside to keep the handle out of contact with the ground.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: February 15, 1977
    Inventor: John J. Doubt