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Masahide Yatsu
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Akishima-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Magnetic disk device and head position control method
Patent number
8,315,008
Issue date
Nov 20, 2012
Kabushiki Kaisha Toshiba
Atsushi Suzuki
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Information
Patent Grant
Magnetic recording apparatus
Patent number
8,300,351
Issue date
Oct 30, 2012
Kabushiki Kaisha Toshiba
Hiroyuki Suzuki
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Information
Patent Grant
Method and apparatus for head positioning using spiral servo patter...
Patent number
7,855,850
Issue date
Dec 21, 2010
Kabushiki Kaisha Toshiba
Toshitaka Matsunaga
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for positioning head using spiral servo patter...
Patent number
7,804,659
Issue date
Sep 28, 2010
Kabushiki Kaisha Toshiba
Toshitaka Matsunaga
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for writing spiral servo pattern in a disk drive
Patent number
7,710,682
Issue date
May 4, 2010
Kabushiki Kaisha Toshiba
Seiji Mizukoshi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for writing servo pattern using spiral pattern...
Patent number
7,675,705
Issue date
Mar 9, 2010
Kabushiki Kaisha Toshiba
Seiji Mizukoshi
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for writing spiral servo pattern in a disk drive
Patent number
7,630,161
Issue date
Dec 8, 2009
Kabushiki Kaisha Toshiba
Shouji Nakajima
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for writing servo management information in a...
Patent number
7,538,965
Issue date
May 26, 2009
Kabushiki Kaisha Toshiba
Katsuki Ueda
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for head positioning control in a disk drive
Patent number
7,489,468
Issue date
Feb 10, 2009
Kabushiki Kaisha Toshiba
Yusuke Ohinata
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for writing servo data in a disk drive using s...
Patent number
7,477,472
Issue date
Jan 13, 2009
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for correcting errors while writing spiral ser...
Patent number
7,457,074
Issue date
Nov 25, 2008
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for servo control using spiral servo informati...
Patent number
7,423,835
Issue date
Sep 9, 2008
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for servo control in a disk drive
Patent number
7,312,946
Issue date
Dec 25, 2007
Kabushiki Kaisha Toshiba
Makoto Asakura
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Information
Patent Grant
Method and apparatus for writing data in a disk drive
Patent number
7,239,472
Issue date
Jul 3, 2007
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for servo information writing in a disk drive
Patent number
7,221,533
Issue date
May 22, 2007
Kabushiki Kaisha Toshiba
Masafumi Iwashiro
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Information
Patent Grant
Head position calculation method in magnetic disc apparatus
Patent number
7,173,789
Issue date
Feb 6, 2007
Kabushiki Kaisha Toshiba
Shinichirou Kouhara
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Information
Patent Grant
Method and apparatus for servowriting in a disk drive
Patent number
7,106,545
Issue date
Sep 12, 2006
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for servo writing in a disk drive
Patent number
6,943,977
Issue date
Sep 13, 2005
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Grant
Control system and control method for positioning a head above a de...
Patent number
6,771,455
Issue date
Aug 3, 2004
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and system for accurate self-servo writing by using relative...
Patent number
6,738,215
Issue date
May 18, 2004
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Grant
System for head positioning control in a disk drive
Patent number
6,417,983
Issue date
Jul 9, 2002
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Grant
Head positioning control system for use in a disk storage drive
Patent number
6,175,465
Issue date
Jan 16, 2001
Kabushiki Kaisha Toshiba
Hidetoshi Kawachi
G11 - INFORMATION STORAGE
Information
Patent Grant
Head positioning control system for use in a disk drive using diffe...
Patent number
6,002,544
Issue date
Dec 14, 1999
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Grant
Head positioning control system for use in a disk storage system
Patent number
5,801,897
Issue date
Sep 1, 1998
Kabushiki Kaisha Toshiba
Hiroyuki Kanda
G11 - INFORMATION STORAGE
Information
Patent Grant
Head positioning system and method for use in disk recording/reprod...
Patent number
5,754,358
Issue date
May 19, 1998
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Grant
Control device of the disk apparatus for positioning a head on a disk
Patent number
5,680,271
Issue date
Oct 21, 1997
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
MAGNETIC RECORDING APPARATUS
Publication number
20110317308
Publication date
Dec 29, 2011
Kabushiki Kaisha Toshiba
Hiroyuki SUZUKI
G11 - INFORMATION STORAGE
Information
Patent Application
MAGNETIC DISK DEVICE AND HEAD POSITION CONTROL METHOD
Publication number
20110310506
Publication date
Dec 22, 2011
Kabushiki Kaisha Toshiba
Atsushi SUZUKI
G11 - INFORMATION STORAGE
Information
Patent Application
METHOD AND APPARATUS FOR HEAD POSITIONING USING SPIRAL SERVO PATTER...
Publication number
20090002871
Publication date
Jan 1, 2009
Kabushiki Kaisha Toshiba
Toshitaka Matsunaga
G11 - INFORMATION STORAGE
Information
Patent Application
METHOD AND APPARATUS FOR POSITIONING HEAD USING SPIRAL SERVO PATTER...
Publication number
20080151414
Publication date
Jun 26, 2008
Kabushiki Kaisha Toshiba
Toshitaka Matsunaga
G11 - INFORMATION STORAGE
Information
Patent Application
METHOD AND APPARATUS FOR WRITING SPIRAL SERVO PATTERN IN A DISK DRIVE
Publication number
20080151409
Publication date
Jun 26, 2008
Kabushiki Kaisha Toshiba
Seiji Mizukoshi
G11 - INFORMATION STORAGE
Information
Patent Application
METHOD AND APPARATUS FOR WRITING SPIRAL SERVO PATTERN IN A DISK DRIVE
Publication number
20080151412
Publication date
Jun 26, 2008
Kabushiki Kaisha Toshiba
Shouji Nakajima
G11 - INFORMATION STORAGE
Information
Patent Application
METHOD AND APPARATUS FOR WRITING SERVO PATTERN USING SPIRAL PATTERN...
Publication number
20080151413
Publication date
Jun 26, 2008
Kabushiki Kaisha Toshiba
Seiji Mizukoshi
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for testing servo data on a disk medium in a d...
Publication number
20080137226
Publication date
Jun 12, 2008
Kabushiki Kaisha Toshiba
Katsuki Ueda
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for writing servo data in a disk drive using s...
Publication number
20080130160
Publication date
Jun 5, 2008
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for writing servo data and positioning head in...
Publication number
20080068740
Publication date
Mar 20, 2008
Kabushiki Kaisha Toshiba
Shinichirou Kouhara
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for writing servo management information in a...
Publication number
20080002278
Publication date
Jan 3, 2008
Kabushiki Kaisha Toshiba
Katsuki Ueda
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for writing a spiral servo pattern on a disk i...
Publication number
20080002279
Publication date
Jan 3, 2008
Kabushiki Kaisha Toshiba
Shinichirou Kouhara
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for writing servo information in a disk drive
Publication number
20070223131
Publication date
Sep 27, 2007
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for head positioning control in a disk drive
Publication number
20070139811
Publication date
Jun 21, 2007
Kabushiki Kaisha Toshiba
Yusuke Ohinata
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for servo control using spiral servo informati...
Publication number
20070097539
Publication date
May 3, 2007
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for writing servo information
Publication number
20070047132
Publication date
Mar 1, 2007
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for servo control in a disk drive
Publication number
20060245105
Publication date
Nov 2, 2006
Kabushiki Kaisha Toshiba
Makoto Asakura
G11 - INFORMATION STORAGE
Information
Patent Application
Head position calculation method in magnetic disc apparatus
Publication number
20060221491
Publication date
Oct 5, 2006
Kabushiki Kaisha Toshiba
Shinichirou Kouhara
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for writing data in a disk drive
Publication number
20060209452
Publication date
Sep 21, 2006
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for servo information writing in a disk drive
Publication number
20060114599
Publication date
Jun 1, 2006
Kabushiki Kaisha Toshiba
Masafumi Iwashiro
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for servo writing with servo pattern examinati...
Publication number
20060109583
Publication date
May 25, 2006
Kabushiki Kaisha Toshiba
Hideo Sado
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for servowriting in a disk drive
Publication number
20050141125
Publication date
Jun 30, 2005
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for servo writing using incorporated servo wri...
Publication number
20040264031
Publication date
Dec 30, 2004
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for servo writing in a disk drive
Publication number
20040075935
Publication date
Apr 22, 2004
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Application
Method and apparatus for controlling the actuator of the head-posit...
Publication number
20030161065
Publication date
Aug 28, 2003
Masahide Yatsu
G11 - INFORMATION STORAGE
Information
Patent Application
Magnetic disk drive apparatus having a self-servo writing system an...
Publication number
20020135927
Publication date
Sep 26, 2002
Kabushiki Kaisha Toshiba
Masahide Yatsu
G11 - INFORMATION STORAGE