Patents by Inventor David Fifield

David Fifield 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).

  • Integrated solar panel and liquid crystal display for portable computer or the like
    Patent number: 5886688
    Abstract: The present apparatus is for use in for example, a personal digital assistant (PDA) laptop computer, personal computer, watch or the like, and in one embodiment includes a transparent or semitransparent liquid crystal display disposed over a solar cell array, and in another embodiment includes a transparent or semitransparent solar cell array disposed over a liquid crystal display. In yet another embodiment, alternate display units and solar cell array units are positioned on a substrate.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: March 23, 1999
    Assignee: National Semiconductor Corporation
    Inventors: David Fifield, Walter K. Hurwitz