Patents by Inventor Robert R. Humiston

Robert R. Humiston 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).

  • Seam knife for dry wall
    Patent number: 5067889
    Abstract: A tool used to work joint compound into a wide angle corner formed by two abutting wallboard panels. The blade is formed of flexible sheet metal that is contoured so that it can be pressed into a wide angle corner to work joint compound into the corner seam and close the joint in a rapid and efficient manner.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: November 26, 1991
    Inventor: Robert R. Humiston