Patents by Inventor Robert J. Thorkildson

Robert J. Thorkildson 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: 4453200
    Abstract: Apparatus for front lighting a display includes a light distributing wedge, spaced from the front of the display to be lighted, through which the display can be viewed. A light source is provided aside the wedge to direct light to an inter space between the wedge and the display. A reflective surface is provided at the wide end of the wedge to reflect light incident upon it. Thus, light from the light source is directed onto the display through various reflecting and refracting paths, including directly onto the display from the light source, reflected from the interior surface of the wedge onto the display, and refracted and reflected within the wedge to be emitted in the direction of the display.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: June 5, 1984
    Assignee: Rockwell International Corporation
    Inventors: James S. Trcka, Robert J. Thorkildson