Patents by Inventor Duayne D. Dougherty

Duayne D. Dougherty 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).

  • Multi-bladed upright for a fence
    Patent number: 3972510
    Abstract: A plurality of metallic tubular uprights incrementally spaced along the top of a fence or similar structure, are each provided with a plurality of upwardly outwardly flared knife-edge segments to prevent climbing of the fence.
    Type: Grant
    Filed: June 24, 1974
    Date of Patent: August 3, 1976
    Inventor: Duayne D. Dougherty
  • Fence post
    Patent number: D245792
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: September 13, 1977
    Inventor: Duayne D. Dougherty
  • Fence post top
    Patent number: D245870
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: September 20, 1977
    Inventor: Duayne D. Dougherty