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Odawara, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Information storing device and method for controlling same to recor...
Patent number
8,345,371
Issue date
Jan 1, 2013
Hitachi Global Storage Technologies Japan, Ltd.
Yuichi Koizumi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information storing device and method for controlling same to recor...
Patent number
7,982,999
Issue date
Jul 19, 2011
Hitachi Global Storage Technologies Japan, Ltd.
Yuichi Koizumi
G11 - INFORMATION STORAGE
Information
Patent Grant
Adjusting clock frequency in a disk drive and a disk system using t...
Patent number
6,967,801
Issue date
Nov 22, 2005
Hitachi Global Storage Technologies Japan, Ltd.
Kazuhiko Satake
G11 - INFORMATION STORAGE
Information
Patent Grant
Information storing device and method for controlling same to recor...
Patent number
6,865,048
Issue date
Mar 8, 2005
Hitachi, Ltd.
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and device for recording and reproducing data
Patent number
6,577,462
Issue date
Jun 10, 2003
Hitachi, Ltd.
Jin Hamada
G11 - INFORMATION STORAGE
Information
Patent Grant
Information storing device and method for controlling same to recor...
Patent number
6,563,658
Issue date
May 13, 2003
Hitachi, Ltd.
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Information storing device and method for controlling same to recor...
Patent number
6,476,994
Issue date
Nov 5, 2002
Hitachi, Ltd.
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Magnetic disk apparatus having an accelerometer for detecting accel...
Patent number
6,407,876
Issue date
Jun 18, 2002
Hitachi, Ltd.
Takashi Yamaguchi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for recording and reproducing disk-type record...
Patent number
6,400,523
Issue date
Jun 4, 2002
Hitachi, Ltd.
Yukari Katayama
G11 - INFORMATION STORAGE
Information
Patent Grant
Information storing device and method for controlling same to recor...
Patent number
6,381,087
Issue date
Apr 30, 2002
Hitachi, Ltd.
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Magnetic disk apparatus having an accelerometer for detecting accel...
Patent number
6,335,845
Issue date
Jan 1, 2002
Hitachi, Ltd.
Takashi Yamaguchi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for recording and reproducing disk-type record...
Patent number
6,236,528
Issue date
May 22, 2001
Hitachi, Ltd.
Yukari Katayama
G11 - INFORMATION STORAGE
Information
Patent Grant
Information storing device and method for controlling same to recor...
Patent number
6,151,182
Issue date
Nov 21, 2000
Hitachi, Ltd.
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Magnetic disk device with dummy write function
Patent number
6,151,181
Issue date
Nov 21, 2000
Hitachi, Ltd.
Hidekazu Honda
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for recording and reproducing disk-type record...
Patent number
6,108,158
Issue date
Aug 22, 2000
Hitachi, Ltd.
Yukari Katayama
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic disk device with dummy write function
Patent number
5,995,310
Issue date
Nov 30, 1999
Hitachi, Ltd.
Hidekazu Honda
G11 - INFORMATION STORAGE
Information
Patent Grant
Apparatus for positioning magnetic head and method of the same
Patent number
5,986,845
Issue date
Nov 16, 1999
Hitachi, Ltd.
Takashi Yamaguchi
G11 - INFORMATION STORAGE
Information
Patent Grant
Information storing device and method for controlling same to recor...
Patent number
5,982,570
Issue date
Nov 9, 1999
Hitachi, Ltd.
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Magnetic disk apparatus
Patent number
5,953,178
Issue date
Sep 14, 1999
Hitachi, Ltd.
Akio Takatsuka
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of and apparatus for recording on and reproducing from disk-...
Patent number
5,715,105
Issue date
Feb 3, 1998
Hitachi, Ltd.
Yukari Katayama
G11 - INFORMATION STORAGE
Information
Patent Grant
Disk apparatus and its control method
Patent number
5,404,255
Issue date
Apr 4, 1995
Hitachi, Ltd.
Masahito Kobayashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Phase and period synchronization for a slave disk drive
Patent number
5,159,503
Issue date
Oct 27, 1992
Hitachi, Ltd.
Masahiro Mitamura
G11 - INFORMATION STORAGE
Information
Patent Grant
Head positioning device for use in magnetic disk equipment
Patent number
5,105,318
Issue date
Apr 14, 1992
Hitachi, Ltd.
Katsuhiro Tsuneta
G11 - INFORMATION STORAGE
Information
Patent Grant
Recording/reproducing method and apparatus of magnetic disk unit in...
Patent number
4,803,572
Issue date
Feb 7, 1989
Hitachi, Ltd.
Toshiyuki Haruna
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
INFORMATION STORING DEVICE AND METHOD FOR CONTROLLING SAME TO RECOR...
Publication number
20110205664
Publication date
Aug 25, 2011
Hitachi Global Storage Technologies Japan, Ltd.
Yuichi KOIZUMI
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Information storing device and method for controlling same to recor...
Publication number
20050146806
Publication date
Jul 7, 2005
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Disk drive and applied disk system
Publication number
20040008442
Publication date
Jan 15, 2004
Hitachi, Ltd
Kazuhiko Satake
G11 - INFORMATION STORAGE
Information
Patent Application
Information storing device and method for controlling same to recor...
Publication number
20030218820
Publication date
Nov 27, 2003
Hitachi, Ltd
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Information storing device and method for controlling same to recor...
Publication number
20030026030
Publication date
Feb 6, 2003
Hitachi, Ltd
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Information storing device and method for controlling same to recor...
Publication number
20020101679
Publication date
Aug 1, 2002
Hitachi, Ltd
Yuichi Koizumi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Method and apparatus for recording and reproducing disk-type record...
Publication number
20020021517
Publication date
Feb 21, 2002
Yukari Katayama
G11 - INFORMATION STORAGE