Patents by Inventor Brad W. Clifford

Brad W. Clifford 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).

  • Multi-colored liquid crystal display device
    Patent number: 4448823
    Abstract: A multi-colored liquid crystal display device for selectively providing different colored segment displays against a contrasting background. The device includes layered color units. Each color unit includes either a standard liquid crystal display unit and a colored polarized filter, or a dichroic liquid crystal display unit.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: May 15, 1984
    Inventor: Brad W. Clifford