Patents by Inventor James A. Clarkson

James A. Clarkson 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).

  • Patent number: 4351134
    Abstract: A hinged gutter guard in the form of an elongated perforated cover plate made of relatively rigid sheet material and equipped along one longitudinal edge with a plurality of hinge straps adapted to be secured to a roof beneath the lower course of shingles thereof. The hinge straps, although permanently attached to the cover plate, are capable of being shifted along the plate to a limited extent to insure proper attachment and operation of the guard.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: September 28, 1982
    Inventor: James A. Clarkson