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Takeshi Kojima
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Yamanashi-ken, JP
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Patents Grants
last 30 patents
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Patent Grant
Glass substrate, magnetic recording medium and method of manufactur...
Patent number
6,217,980
Issue date
Apr 17, 2001
Hoya Corporation
Kouichi Takahashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic recording medium having a glass substrate and method of ma...
Patent number
6,096,405
Issue date
Aug 1, 2000
Hoya Corporation
Kouichi Takahashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of manufacturing a magnetic recording disk using glass subst...
Patent number
5,725,625
Issue date
Mar 10, 1998
Hoya Corporation
Teruki Kitayama
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method of manufacturing a magnetic recording disk
Patent number
5,681,609
Issue date
Oct 28, 1997
Hoya Corporation
Teruki Kitayama
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Sheet glass flattening method, method of manufacturing glass substr...
Patent number
5,654,057
Issue date
Aug 5, 1997
Hoya Corporation
Teruki Kitayama
C03 - GLASS MINERAL OR SLAG WOOL