Patents by Inventor Kyoko Tadaki

Kyoko Tadaki 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 head unit for optical disk apparatus having both focus control and track control function
    Patent number: 6272079
    Abstract: An optical head unit used for an optical disk apparatus is provided. The optical head unit includes an object glass assembly for focusing a laser beam from a light source on an optical disk, an actuator movable at least in a focus control direction, a carriage for supporting the actuator and moving the actuator in a track control direction, and a slider which is attached to the carriage and capable of adjusting its posture in relation to a surface of the optical disk. The object glass assembly is provided with a plurality of lens units. Each lens unit includes at least one lens. One of the plural lens units is supported by the slider.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: August 7, 2001
    Assignee: Fujitsu Limited
    Inventors: Nobuyuki Kanto, Koichi Tezuka, Haruhiko Izumi, Satoshi Shimokawa, Shingo Hamaguchi, Akihiko Makita, Kyoko Tadaki, Kazushi Uno, Goro Kawasaki