Patents by Inventor Albert F. Harrington

Albert F. Harrington 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).

  • Method and apparatus for making transmission holograms
    Patent number: 4973113
    Abstract: This invention relates to a method and apparatus for making transmission holograms and, more specifically, using a rotatable drum adapted to receive a beam of actinic radiation on a reflector in the drum reflecting a portion of the beam through a master to a recording medium to form the transmission hologram in the recording medium.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: November 27, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert F. Harrington, Robert R. Krebs
  • Holographic optical combiners for head-up displays
    Patent number: 4950567
    Abstract: Optical Combiners are provided for use in Head-Up Displays. The Combiners have a refractive index modulation greater than approximately 0.001.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: August 21, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dalen E. Keys, William K. Smothers, Albert F. Harrington, Jacob Beutel, Scott R. Schicker, Dillon F. Scofield
  • Holographic optical elements having a reflection hologram formed in a photopolymer
    Patent number: 4942102
    Abstract: Improved holographic optical elements are disclosed that contain a reflection hologram. Also, an improved process for forming reflection hologram.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: July 17, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Dalen E. Keys, William K. Smothers, Albert F. Harrington, Jacob Beutel, Scott R. Schicker, Dillion F. Scofield