Patents by Inventor Laurence D. Britt

Laurence D. Britt 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).

  • Phosphorescent escape route indicator
    Patent number: 4401050
    Abstract: A phosphorescent escape route indicator having at least one protruding indicia formed within or attached to a sheet of material. The protruding indicia has incorporated therewith a phosphorescent substance capable of emitting a glow in the absence of light. An adhesive formed as part of the sheet is utilized to apply the indicator to the surface of walls or stairways thereby aiding in delineating escape routes or access routes to emergency equipment during time of emergency.
    Type: Grant
    Filed: September 30, 1981
    Date of Patent: August 30, 1983
    Inventors: Laurence D. Britt, Richard G. Britt