Patents by Inventor Michio Naruto

Michio Naruto 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).

  • Optical data recording and reproducing apparatus and method employing an optical head at the center of a spherical recording medium
    Patent number: 5506398
    Abstract: An optical disk drive which does not require a high precision servo mechanism and intensive error correction technique. The recording surface of a recording medium is stationary and is completed as a spherical or semi-spherical plane. An optical head is provided at the center of curvature. A laser beam emitted from the optical head, provided at the center of curvature, is displaced physically or electrically, without rotating the recording surface.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: April 9, 1996
    Assignee: Fujitsu Limited
    Inventor: Michio Naruto