Patents by Inventor Shoji Katsuyama

Shoji Katsuyama 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).

  • Publication number: 20200033590
    Abstract: This invention is provided with: a light source; a light scanning mirror; a measurement mechanism for measuring a change in the intensity of light reflected from an eyeball as time elapses through the scanning of at least a surface of the pupil with a light beam by means of the light scanning mirror; a sampling mechanism for sampling the intensity of light reflected from the pupil from the measured change in the intensity of the reflected light as time elapses; and a mechanism for detecting the size and the position of the pupil by synchronizing the sampled intensity of light reflected from the pupil, and the scanning time during which the surface of the eyeball is scanned; and an image generating mechanism for forming an image on the retina of the eyeball by projecting a light beam for generating an image onto the pupil in the detected position while scanning.
    Type: Application
    Filed: October 1, 2019
    Publication date: January 30, 2020
    Applicant: University of Fukui
    Inventors: Toshio Katsuyama, Shoji Yamada
  • Patent number: 5223789
    Abstract: An AC/DC current detection method that can detect small and large changes in current, by employing a high-frequency excitation current applied to a coil wrapped around an annular iron core. The change in this value is determined for operation in the region of the coercive force of the iron core or as the change in an extreme value thereof.
    Type: Grant
    Filed: March 27, 1992
    Date of Patent: June 29, 1993
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Shoji Katsuyama, Yasutoshi Ide, Hideki Koyama