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Kiyotaka Okuyama

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  • Nagano, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Magnetic recording medium
    • Patent number 5,514,463
    • Issue date May 7, 1996
    • TDK Corporation
    • Kiminori Tamai
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    8mm video tape cassette
    • Patent number 5,351,902
    • Issue date Oct 4, 1994
    • TDK Corporation
    • Kouji Matsuno
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium comprising a magnetic coating containing...
    • Patent number 5,225,281
    • Issue date Jul 6, 1993
    • TDK Corporation
    • Kiminori Tamai
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,609,588
    • Issue date Sep 2, 1986
    • TDK Corporation
    • Akihiko Hosaka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,600,650
    • Issue date Jul 15, 1986
    • TDK Corporation
    • Akihiko Hosaka
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,460,651
    • Issue date Jul 17, 1984
    • TDK Corporation
    • Akihiko Hosaka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Process for producing a magnetic recording medium
    • Patent number 4,459,319
    • Issue date Jul 10, 1984
    • TDK Corporation
    • Akihiko Hosaka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,404,259
    • Issue date Sep 13, 1983
    • TDK Electronics Co., Ltd.
    • Akihiko Hosaka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,396,659
    • Issue date Aug 2, 1983
    • TDK Electronics Co., Ltd.
    • Fujio Shibata
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,391,864
    • Issue date Jul 5, 1983
    • TDK Electronics Co., Ltd.
    • Akihiko Hosaka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,389,458
    • Issue date Jun 21, 1983
    • TDK Electronics Co., Ltd.
    • Akihiko Hosaka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,370,384
    • Issue date Jan 25, 1983
    • TDK Electronics Co., Ltd.
    • Akihiko Hosaka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,367,264
    • Issue date Jan 4, 1983
    • TDK Electronics Co., Ltd.
    • Akihiko Hosaka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,361,621
    • Issue date Nov 30, 1982
    • TDK Electronics Co., Ltd.
    • Yukihiro Isobe
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,357,391
    • Issue date Nov 2, 1982
    • TDK Electronics Co., Ltd.
    • Akihiko Hosaka
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Magnetic recording medium and preparation thereof
    • Patent number 4,336,310
    • Issue date Jun 22, 1982
    • TDK Electronics Co., Ltd.
    • Kiyotaka Okuyama
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,323,628
    • Issue date Apr 6, 1982
    • TDK Electronics Co., Ltd.
    • Kiyotaka Okuyama
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic recording medium
    • Patent number 4,238,548
    • Issue date Dec 9, 1980
    • TDK Electronics Company Limited
    • Kiyotaka Okuyama
    • G11 - INFORMATION STORAGE