Patents by Inventor H. Edward Littell, Jr.

H. Edward Littell, Jr. 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).

  • Windshield display system for an automobile
    Patent number: 5313292
    Abstract: A windshield display system for automobile includes a wavelength selective holographic combiner (12) laminated within the plies (36, 50) of an automobile windshield. A lamination process is provided to prevent degradation of the holographic combiner (12), which might otherwise occur with conventional windshield lamination processes. The holographic combiner (12) is processed in a manner that permits it to withstand the temperature and pressure extremes of the windshield lamination process. Also provided is a display system (60) for producing an image of vehicle information and the motorist's field of view as the motorist observes the real world scene.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: May 17, 1994
    Assignee: Flight Dynamics
    Inventors: Robert B. Wood, Mark A. Thomas, James L. Valimont, H. Edward Littell, Jr., Glenn E. Freeman
  • Preparation of photosensitive material to withstand a lamination process
    Patent number: 5138469
    Abstract: A method for processing exposed holograms to enhance their thermal stability and enable them to withstand a windshield lamination process is disclosed. The secondary processing procedure entails an optional step of applying a moisture barrier to the hologram, followed by heat stabilizing the hologram and storing it in a relatively low humidity environment. Specifically, the exposed holographic material is heated to a peak temperature of about 135.degree. C. and thereafter cooled to provide a thermally stabilized holographic material that maintains its holographic qualities over a relatively broad range of temperatures.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: August 11, 1992
    Assignee: Flight Dynamics, Inc.
    Inventors: Robert B. Wood, Mark A. Thomas, James L. Valimont, H. Edward Littell, Jr., Glenn E. Freeman
  • Vehicle display system using a holographic windshield prepared to withstand lamination process
    Patent number: 4842389
    Abstract: A holographic windshield (10) includes an inner glass ply (36) having an inner flexible optically transparent inner interlayer (42) overlaid upon its inner surface (40). A middle flexible transparent interlayer (44) is overlaid upon the inner interlayer. The middle interlayer has an opening (46) formed therein. A flexible hologram (12) is fitted within the opening in the middle interlayer. An outer interlayer (48) is overlaid upon the middle interlayer including the flexible hologram. An outer glass ply (50) is overlaid upon the outer interlayer. The two glass plies are bonded together to form a unitary article. Also disclosed is a method for processing a holographic combiner to withstand a windshield construction process employing lamination techniques.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: June 27, 1989
    Assignee: Flight Dynamics, Inc.
    Inventors: Robert B. Wood, Mark A. Thomas, James L. Valimont, H. Edward Littell, Jr., Glenn E. Freeman