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Keiji Moroishi
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Akishima, JP
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last 30 patents
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Patent Grant
Magnetic recording medium having an improved magnetic characteristic
Patent number
6,287,429
Issue date
Sep 11, 2001
Hoya Corporation
Keiji Moroishi
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Magnetic recording medium and method of manufacturing the same
Patent number
5,968,679
Issue date
Oct 19, 1999
Hoya Corporation
Masato Kobayashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of manufacturing magnetic recording medium
Patent number
5,954,927
Issue date
Sep 21, 1999
Hoya Corporation
Masato Kobayashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic recording media, methods for producing the same and magnet...
Patent number
5,900,324
Issue date
May 4, 1999
Hoya Corporation
Keiji Moroishi
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic recording media and methods for producing the same
Patent number
5,824,427
Issue date
Oct 20, 1998
Hoya Corporation
Masato Kobayashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic recording medium and method for manufacturing the same
Patent number
5,766,727
Issue date
Jun 16, 1998
Hoya Corporation
Keiji Moroishi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of manufacturing magnetic recording medium
Patent number
5,746,893
Issue date
May 5, 1998
Hoya Corporation
Masato Kobayashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Process for producing metal oxide-type superconductive material
Patent number
5,100,869
Issue date
Mar 31, 1992
Tsuyoshi Masumoto
Tsuyoshi Masumoto
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES