Patents Assigned to SumX Corporation
  • Photoelectrochromic display
    Patent number: 4599614
    Abstract: A solid electrochromic film is used on a semiconductor electrode in a display device permitting the user to write on the display using a light pen. Additional elements, including arrangement of the semiconductor electrodes transversely with respect to counter-electrodes, or providing an electrochromic film on the counter-electrodes, further enhance the versatility of the display device.
    Type: Grant
    Filed: September 13, 1983
    Date of Patent: July 8, 1986
    Assignee: SumX Corporation
    Inventors: David W. DeBerry, Alfred Viehbeck