Patents by Inventor David Wotherspoon

David Wotherspoon 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).

  • Rope with strain damage indicator
    Patent number: 5605035
    Abstract: A rope including a heat sensitive component which is subject to a visible change in appearance, such as a color change, when exposed to a selected elevated temperature resulting from a strain-related heat release from the rope. The heat sensitive coating may be contained in a coating over a fiber of the rope or a rope strand, or may be incorporated in sheath located over the load-bearing core of the rope.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: February 25, 1997
    Assignees: University of Strathclyde, Bones Ord (Holdings) Ltd.
    Inventors: Richard A. Pethrick, David Wotherspoon