Patents by Inventor Toshihiko Naruyama

Toshihiko Naruyama 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).

  • Rewritable optical recording medium and manufacturing method and apparatus therefor
    Publication number: 20030198171
    Abstract: A rewritable optical recording medium includes a segmented groove area in which the groove track is segmented along a rotating direction of the recording medium by groove non-forming portions to form a plurality of groove portions; and a continuous groove area in which a continuous groove is formed, the continuous groove having a groove width smaller than a groove width in the segmented groove area.
    Type: Application
    Filed: June 2, 2003
    Publication date: October 23, 2003
    Applicant: Pioneer Corporation
    Inventors: Yoshio Sasaki, Toshihiko Naruyama, Eiji Muramatsu, Masahiro Kato, Seiro Oshima, Takao Tagiri