Patents by Inventor Julie L. Walker

Julie L. Walker 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).

  • Holographic color control systems
    Patent number: 4986619
    Abstract: Holographic color control systems are disclosed for the production of pseudocolor holograms by in-situ sequential swelling of an emulsion and exposure to three color separation images with a single wavelength reference light source. The resulting holograms yield images in three color primaries with excellent color registration and mixing, producing a full gamut of mixed colors, pastels and neutrals with three-dimensional perspective.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: January 22, 1991
    Assignee: Massachusetts Institute of Technology
    Inventors: Julie L. Walker, Stephen A. Benton