Patents by Inventor Michael D. McDiarmid

Michael D. McDiarmid 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 improving contrast in electrophoretic display
    Patent number: 4053768
    Abstract: Apparatus and method for improving contrast in the visual image formed by toner deposited on an electrostatic image such as is formed in electronradiography. Electrophoretic toner particles and a dye are dispersed in a liquid, with the particles being deposited onto a substrate which carries the electrostatic image, with the selectively attracted particles forming the visual image. The visual image is viewed by reflected or scattered light with the light having a color emission spectrum substantially corresponding to the absorption spectrum of the dye for absorbing and thereby eliminating unwanted light.
    Type: Grant
    Filed: September 10, 1976
    Date of Patent: October 11, 1977
    Assignee: Xonics, Inc.
    Inventors: John H. Lewis, Michael D. McDiarmid