Patents by Inventor Shigeaki Sonoda

Shigeaki Sonoda 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).

  • Pupil measuring system and Alzheimer's disease diagnosing system
    Patent number: 5883691
    Abstract: Light sources illuminate eyes in a predetermined cycle using the pulse of light. Video cameras are directed to the eyes, and a video signal of the pupil is output. This video signal is output to a digital computer via video control units, a multiplexer, and an analog-to-digital converter. The digital computer detects the size of the pupil by processing an input video signal.
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: March 16, 1999
    Assignee: Nihon Kohden Corporation
    Inventors: Norio Ishikawa, Hidehiro Hosaka, Shigeaki Sonoda