Patents by Inventor Syuji Uehara

Syuji Uehara 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).

  • Disc recording medium including rotational-angle marks, recording apparatus and playback apparatus
    Publication number: 20040017746
    Abstract: Disclosed herein are a disc recording medium, a recording apparatus and a playback apparatus, more concretely, the present invention provides a disc recording medium wherein a circular track is created in advance to be used for recording data as a groove or a land, said track is wobbled to contain approximately fixed number of wobbling periods as counted in a longitudinal direction of said track, and said track includes rotational-angle marks each showing a predetermined rotational angular position on said disc recording medium. As a result, the precision and the reliability of recording can be attained.
    Type: Application
    Filed: April 22, 2003
    Publication date: January 29, 2004
    Applicant: Sony Corporation
    Inventors: Toru Takeda, Satoshi Kumai, Tatsuo Mikami, Syuji Uehara, Toshiharu Okanishi, Kenji Ogawa, Norio Nishida, Shoji Sato, Hideki Ishikawa, Kazumi Munekata, Kaoru Yanamoto, Norichika Mine