Patents by Inventor Walter G. Doherty

Walter G. Doherty 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).

  • Mold for making frusto-conical plugs
    Patent number: 4067538
    Abstract: This invention provides an improved mold for manufacturing plugs used in the repair of small holes in pavement.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: January 10, 1978
    Inventor: Walter G. Doherty