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Ryoji Chubachi

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  • Sendai, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Disc-shaped magnetic recording medium
    • Patent number 4,788,092
    • Issue date Nov 29, 1988
    • Sony Corporation
    • Ryoji Chubachi
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,654,260
    • Issue date Mar 31, 1987
    • Sony Corporation
    • Ryoji Chubachi
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,613,545
    • Issue date Sep 23, 1986
    • Sony Corporation
    • Ryoji Chubachi
    • G11 - INFORMATION STORAGE