Patents by Inventor Koiti Komawaki

Koiti Komawaki 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 disk having a continuous recording track formed of alternating land and groove revolutions
    Patent number: 5848050
    Abstract: In an optical disk having information recording tracks of lands and grooves, the grooves are wobbled in a radial direction of the disk so as to represent rotation information and sector management information, at least one pair of a wobbling part and an unwobbling part arranged one after another are provided every revolution, such that the wobbling parts in the grooves next to each other do not overlap in the radial direction of the disk. Since the wobble parts in the grooves next to each other do not overlap in the radial direction, the wobble data can be obtained regardless of whether a beam spot is tracing a land track or a groove track, and even in a data part of each sector.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: December 8, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masato Nagasawa, Kazuhiko Nakane, Tsuyoshi Katayama, Koiti Komawaki, Yoshinobu Ishida