Patents by Inventor John Ashall

John Ashall 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).

  • Display system
    Patent number: 5625968
    Abstract: An edgelit illuminated display system has a transparent medium having first and second opposing surfaces and at least one edge operable with a light source for illuminating the first and second surfaces. A matrix of dots on each of the surfaces is arranged to allow interaction of light between the surfaces. The matrix of dots on at least one of the surfaces substantially covers the entire surface for providing an even increased illumination throughout the surface, wherein when a graphic image is supported over the surface the graphic image is evenly illuminated.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: May 6, 1997
    Assignee: Illumination Research Group, Inc.
    Inventor: John Ashall
  • Display system
    Patent number: 5390436
    Abstract: An edgelit illuminated display system has a transparent medium having first and second opposing surfaces and at least one edge operable with a light source for illuminating the first and second surfaces. A matrix of dots on each of the surfaces is arranged to allow interaction of light between the surfaces. The matrix of dots on at least one of the surfaces substantially covers the entire surface for providing an even increased illumination throughout the surface, wherein when a graphic image is supported over the surface the graphic image is evenly illuminated.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: February 21, 1995
    Assignee: Illumination Research Group, Inc.
    Inventor: John Ashall