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Ryouichi Kawasaki

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  • Isesaki-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical pickup device
    • Patent number 8,165,003
    • Issue date Apr 24, 2012
    • Sanyo Electric Co., LTD
    • Tohru Hotta
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Lens and optical pickup device
    • Patent number 7,554,751
    • Issue date Jun 30, 2009
    • Sanyo Electric Co., LTD
    • Tohru Hotta
    • G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

  • Information Patent Application

    Optical Pickup Unit and Optical Disk Apparatus
    • Publication number 20090022032
    • Publication date Jan 22, 2009
    • Sanyo Electric Co., Ltd.
    • Ryouichi Kawasaki
    • G11 - INFORMATION STORAGE
  • Information Patent Application

    Lens and optical pickup device
    • Publication number 20070008630
    • Publication date Jan 11, 2007
    • Sanyo Electric Co., Ltd.
    • Tohru Hotta
    • G02 - OPTICS
  • Information Patent Application

    Optical pickup device
    • Publication number 20060280065
    • Publication date Dec 14, 2006
    • Sanyo Electric Co., Ltd.
    • Tohru Hotta
    • G11 - INFORMATION STORAGE