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Toshihiko Yoshikawa

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  • Chiba, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic recording medium
    • Patent number 6,815,097
    • Issue date Nov 9, 2004
    • Showa Denko K.K.
    • Toshihiko Yoshikawa
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 6,274,233
    • Issue date Aug 14, 2001
    • Showa Denko Kabushiki Kaisha
    • Toshihiko Yoshikawa
    • G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents