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Tomotaka Yokoyama
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Method of manufacturing glass substrate for magnetic disk and syste...
Patent number
8,640,497
Issue date
Feb 4, 2014
Hoya Corporation
Ryuuichi Kashima
B24 - GRINDING POLISHING
Information
Patent Grant
Method of manufacturing a magnetic disk
Patent number
8,567,044
Issue date
Oct 29, 2013
Hoya Corporation
Hiroshi Takeda
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Method for supporting manufacture of a magnetic disk
Patent number
8,033,008
Issue date
Oct 11, 2011
Hoya Corporation
Hiroshi Takeda
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Management technique of friction coefficient based on surface rough...
Patent number
7,220,446
Issue date
May 22, 2007
Hoya Corporation
Tomotaka Yokoyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Substrate for an information recording medium, information recordin...
Patent number
6,852,010
Issue date
Feb 8, 2005
Hoya Corporation
Kouji Takahashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Substrate for information recording medium, information recording m...
Patent number
6,790,509
Issue date
Sep 14, 2004
Hoya Corporation
Tomotaka Yokoyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Management technique of friction coefficient based on surface rough...
Patent number
6,706,427
Issue date
Mar 16, 2004
Hoya Corporation
Tomotaka Yokoyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic recording medium and manufacturing method therefor
Patent number
6,670,055
Issue date
Dec 30, 2003
Hoya Corporation
Hiroshi Tomiyasu
G11 - INFORMATION STORAGE
Information
Patent Grant
Substrate for an information recording medium, information recordin...
Patent number
6,537,648
Issue date
Mar 25, 2003
Hoya Corporation
Kouji Takahashi
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
MAGNETIC DISK MANUFACTURING SUPPORT METHOD AND MAGNETIC DISK MANUFA...
Publication number
20110308073
Publication date
Dec 22, 2011
HOYA GLASS DISK (THAILAND) LTD.
Hiroshi TAKEDA
G11 - INFORMATION STORAGE
Information
Patent Application
METHOD OF MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK AND SYSTE...
Publication number
20100024484
Publication date
Feb 4, 2010
HOYA CORPORATION
Ryuuichi Kashima
B24 - GRINDING POLISHING
Information
Patent Application
MAGNETIC DISK MANUFACTURING SUPPORT METHOD AND MAGNETIC DISK MANUFA...
Publication number
20080180844
Publication date
Jul 31, 2008
HOYA CORPORATION
Hiroshi TAKEDA
G11 - INFORMATION STORAGE
Information
Patent Application
Management technique of friction coefficient based on surface rough...
Publication number
20040170870
Publication date
Sep 2, 2004
Hoya Corporation
Tomotaka Yokoyama
B32 - LAYERED PRODUCTS
Information
Patent Application
Magnetic recording medium and method of producing the same
Publication number
20030203244
Publication date
Oct 30, 2003
Hoya Corporation
Hideki Isono
G11 - INFORMATION STORAGE
Information
Patent Application
Substrate for an information recording medium, information recordin...
Publication number
20030113506
Publication date
Jun 19, 2003
Hoya Corporation
Kouji Takahashi
G11 - INFORMATION STORAGE
Information
Patent Application
Magnetic recording medium
Publication number
20030096140
Publication date
May 22, 2003
Hoya Corporation
Hiroshi Tomiyasu
G11 - INFORMATION STORAGE
Information
Patent Application
Substrate for information recording medium, information recording m...
Publication number
20020164505
Publication date
Nov 7, 2002
HOYA CORPORATION
Tomotaka Yokoyama
G11 - INFORMATION STORAGE
Information
Patent Application
Magnetic recording medium and manufacturing method therefor
Publication number
20020119350
Publication date
Aug 29, 2002
Hoya Corporation
Hiroshi Tomiyasu
G11 - INFORMATION STORAGE
Information
Patent Application
Management technique of friction coefficient based on surface rough...
Publication number
20010053444
Publication date
Dec 20, 2001
Hoya Corporation
Tomotaka Yokoyama
B82 - NANO-TECHNOLOGY