TREA

Akira Morioka

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  • Kyoto, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,871,606
    • Issue date Oct 3, 1989
    • Hitachi Maxell, Ltd.
    • Takeshi Matsuura
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,716,076
    • Issue date Dec 29, 1987
    • Hitachi Maxell, Ltd.
    • Akira Morioka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,618,536
    • Issue date Oct 21, 1986
    • Hitachi Maxell, Ltd.
    • Akira Morioka
    • G02 - OPTICS