TREA

Fumio Maruta

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  • Nagano, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic recording medium
    • Patent number 5,080,971
    • Issue date Jan 14, 1992
    • TDK Corporation
    • Kenji Yokoyama
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 5,069,967
    • Issue date Dec 3, 1991
    • TDK Corporation
    • Kenji Yokoyama
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,889,767
    • Issue date Dec 26, 1989
    • TDK Corporation
    • Kenji Yokoyama
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,880,687
    • Issue date Nov 14, 1989
    • TDK Corporation
    • Kenji Yokoyama
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,816,334
    • Issue date Mar 28, 1989
    • TDK Corporation
    • Kenji Yokoyama
    • G11 - INFORMATION STORAGE