Patents by Inventor Harlan Demers

Harlan Demers 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).

  • Gaff
    Patent number: 4679658
    Abstract: A gaff is provided for use in climbing a wooden utility pole (to include trees), said gaff having one or more grooves preferably running along a line parallel to the line formed by the intersection of the planes of its top two sides and/or one or more teeth for cutting into the pole.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: July 14, 1987
    Assignee: Koppers Company, Inc.
    Inventor: Harlan Demers