Takehiko Hamaguchi

Person

Omiya, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Data storage device defining track trajectory to reduce AC track sq...
- Patent number 11,049,518
- Issue date Jun 29, 2021
- Western Digital Technologies, Inc.
- Hiroshi Ide
- G11 - INFORMATION STORAGE
Information Patent Grant
Data storage device defining track trajectory to reduce AC track sq...
- Patent number 10,699,745
- Issue date Jun 30, 2020
- Western Digital Technologies, Inc.
- Hiroshi Ide
- G11 - INFORMATION STORAGE
Information Patent Grant
Data storage device generating PES RRO and data sector squeeze RRO...
- Patent number 10,607,645
- Issue date Mar 31, 2020
- Western Digital Technologies, Inc.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Control method for magnetic disk device, magnetic disk device, and...
- Patent number 8,049,986
- Issue date Nov 1, 2011
- Hitachi Global Storage Technologies Netherlands B.V.
- Kenya Ito
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Method of servo writing for magnetic recording system, magnetic rec...
- Patent number 7,839,590
- Issue date Nov 23, 2010
- Hitachi Global Storage Technologies Japan, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk degaussing device and degaussing method
- Patent number 7,724,490
- Issue date May 25, 2010
- Hitachi Global Storage Technologies Netherlands B.V.
- Hitoshi Tamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk apparatus having an adjustable mechanism to compensat...
- Patent number 7,545,595
- Issue date Jun 9, 2009
- Hitachi Global Storage Technologies Japan, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Thermal assist head slider
- Patent number 7,525,765
- Issue date Apr 28, 2009
- Hitachi Global Storage Technologies Netherlands B.V.
- Masayuki Kurita
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head tester and method of manufacturing magnetic disk drive
- Patent number 7,518,814
- Issue date Apr 14, 2009
- Hitachi Global Storage Technologies Netherlands B.V.
- Hiroshi Umezaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular hard disk drive resistive against external magnetic f...
- Patent number 7,486,485
- Issue date Feb 3, 2009
- Hitachi Global Storage Technologies Netherlands B.V.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Alternative DC-burst servo pattern for perpendicular recording
- Patent number 7,474,493
- Issue date Jan 6, 2009
- Hitachi Global Storage Technologies Japan, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk drive
- Patent number 7,443,625
- Issue date Oct 28, 2008
- Hitachi Global Storage Technologies Japan Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of servo writing for magnetic recording system, magnetic rec...
- Patent number 7,436,611
- Issue date Oct 14, 2008
- Hitachi Global Storage Technologies Japan, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Servo information recording method, magnetic recording media, and m...
- Patent number 7,365,933
- Issue date Apr 29, 2008
- Hitachi Global Storage Technologies Netherlands B.V.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Stray field detector, magnetic disk drive, and method of head escaping
- Patent number 7,289,284
- Issue date Oct 30, 2007
- Hitachi Global Storage Technologies Netherlands B.V.
- Reiko Arai
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head with high reliability of the data protection, magneti...
- Patent number 7,221,530
- Issue date May 22, 2007
- Hitachi Global Storage Technologies Japan, Ltd.
- Futoshi Tomiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic hard disk drive
- Patent number 7,184,236
- Issue date Feb 27, 2007
- Hitachi Global Storage Technologies Japan, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording apparatus
- Patent number 7,092,181
- Issue date Aug 15, 2006
- Hitachi Global Storage Technologies Japan, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of servo writing for magnetic recording system, magnetic rec...
- Patent number 7,075,743
- Issue date Jul 11, 2006
- Hitachi Global Storage Technologies Japan, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording apparatus
- Patent number 7,068,462
- Issue date Jun 27, 2006
- Hitachi, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk device having a write head to write by shifting in a...
- Patent number 7,057,838
- Issue date Jun 6, 2006
- Hitachi, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording apparatus, magnetic recording medium and magneti...
- Patent number 7,031,086
- Issue date Apr 18, 2006
- Hitachi, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk apparatus having an adjustable mechanism to compensat...
- Patent number 7,027,248
- Issue date Apr 11, 2006
- Hitachi, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
MAGNETIC HEAD WITH HIGH RELIABILITY OF THE DATA PROTECTION, MAGNETI...
- Patent number 6,940,690
- Issue date Sep 6, 2005
- Hitachi Global Storage Technologies Japan, Ltd.
- Futoshi Tomiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording/reproducing device
- Patent number 6,909,566
- Issue date Jun 21, 2005
- Hitachi Global Storage Technologies Japan, Ltd.
- Hideki Zaitsu
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk drive
- Patent number 6,906,889
- Issue date Jun 14, 2005
- Hitachi, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording disk drive
- Patent number 6,879,460
- Issue date Apr 12, 2005
- Hitachi Global Storage Technologies Japan, Ltd.
- Futoshi Tomiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic hard disk drive
- Patent number 6,822,818
- Issue date Nov 23, 2004
- Hitachi, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk drive
- Patent number 6,760,172
- Issue date Jul 6, 2004
- Hitachi, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk drive
- Patent number 6,717,760
- Issue date Apr 6, 2004
- Hitachi Global Storage Technologies, Japan, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
DATA STORAGE DEVICE DEFINING TRACK TRAJECTORY TO REDUCE AC TRACK SQ...
- Publication number 20200411050
- Publication date Dec 31, 2020
- Western Digital Technologies, Inc.
- Hiroshi Ide
- G11 - INFORMATION STORAGE
Information Patent Application
Control Method for Magnetic Disk Device, Magnetic Disk Device, and...
- Publication number 20100085657
- Publication date Apr 8, 2010
- Kenya Ito
- G11 - INFORMATION STORAGE
Information Patent Application
Method of servo writing for magnetic recording system, magnetic rec...
- Publication number 20090021854
- Publication date Jan 22, 2009
- Hitachi Global Storage Technologies Japan, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Application
Manufacturing method for magnetic disk drive
- Publication number 20080192379
- Publication date Aug 14, 2008
- Masayuki Kurita
- G11 - INFORMATION STORAGE
Information Patent Application
Method of producing a magnetic disk device with servo data recorded...
- Publication number 20080186629
- Publication date Aug 7, 2008
- Hitachi Global Storage Technologies Inc.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Method of servo pattern writing on recording surface and data stora...
- Publication number 20070247741
- Publication date Oct 25, 2007
- Hitachi Global Storage Technologies Netherlands B.V.
- Kyo Akagi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic disk degaussing device and degaussing method
- Publication number 20070247776
- Publication date Oct 25, 2007
- Hitachi Global Storage Technologies Netherlands B.V.
- Hitoshi Tamura
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic head tester and method of manufacturing magnetic disk drive
- Publication number 20070046286
- Publication date Mar 1, 2007
- Hitachi Global Storage Technologies Netherlands B.V.
- Hiroshi Umezaki
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording head and magnetic disk storage apparatus mountin...
- Publication number 20060262453
- Publication date Nov 23, 2006
- Hitachi Global Storage Technologies Netherlands B.V.
- Masafumi Mochizuki
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic disk drive
- Publication number 20060187578
- Publication date Aug 24, 2006
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Method of servo writing for magnetic recording system, magnetic rec...
- Publication number 20060171052
- Publication date Aug 3, 2006
- Hitachi Global Storage Technologies Japan, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Application
Servo information recording method, magnetic recording media, and m...
- Publication number 20060152843
- Publication date Jul 13, 2006
- Hitachi Global Storage Technologies Netherlands B.V.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic disk apparatus having an adjustable mechanism to compensat...
- Publication number 20060132957
- Publication date Jun 22, 2006
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Thermal assist head slider
- Publication number 20060119971
- Publication date Jun 8, 2006
- Hitachi Global Storage Technologies Netherlands B.V.
- Masayuki Kurita
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording medium, method of manufacturing the magnetic rec...
- Publication number 20060121317
- Publication date Jun 8, 2006
- Hitachi Global Storage Technologies Netherlands B.V.
- Yuichi Kokaku
- G11 - INFORMATION STORAGE
Information Patent Application
Perpendicular hard disk drive resistive against external magnetic f...
- Publication number 20060092556
- Publication date May 4, 2006
- Hitachi Global Storage Technologies Netherlands B.V.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic head with high reliability of the data protection, magneti...
- Publication number 20060028752
- Publication date Feb 9, 2006
- Futoshi Tomiyama
- G11 - INFORMATION STORAGE
Information Patent Application
Stray field detector, magnetic disk drive, and method of head escaping
- Publication number 20060028747
- Publication date Feb 9, 2006
- Hitachi Global Storage Technologies
- Reiko Arai
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording apparatus
- Publication number 20050270676
- Publication date Dec 8, 2005
- Hitachi, Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic hard disk drive
- Publication number 20050036226
- Publication date Feb 17, 2005
- Hitachi, Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording apparatus, magnetic recording medium and magneti...
- Publication number 20040257690
- Publication date Dec 23, 2004
- Hitachi., Ltd.
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Application
Altermatove DC-burstservo pattern for perpendicular recording
- Publication number 20040252394
- Publication date Dec 16, 2004
- Hitachi., Ltd.
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Method and apparatus for data reproducing in information storage sy...
- Publication number 20040252399
- Publication date Dec 16, 2004
- Hideaki Maeda
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic head with high reliability of the data protection, magneti...
- Publication number 20040080856
- Publication date Apr 29, 2004
- Hitachi, Ltd.
- Futoshi Tomiyama
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording disk drive
- Publication number 20040075937
- Publication date Apr 22, 2004
- Hitachi, Ltd.
- Futoshi Tomiyama
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic disk apparatus having an adjustable mechanism to compensat...
- Publication number 20040027709
- Publication date Feb 12, 2004
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording apparatus
- Publication number 20030223147
- Publication date Dec 4, 2003
- Yasutaka Nishida
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic disk drive
- Publication number 20030189774
- Publication date Oct 9, 2003
- Takehiko Hamaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic disk apparatus, magnetic recording medium and method of se...
- Publication number 20030142435
- Publication date Jul 31, 2003
- Futoshi Tomiyama
- G11 - INFORMATION STORAGE
Information Patent Application
Method for reproducing information on a recording medium
- Publication number 20030123333
- Publication date Jul 3, 2003
- Hideki Saga
- G11 - INFORMATION STORAGE

Takehiko Hamaguchi

Person

Patents Grantslast 30 patents

Data storage device defining track trajectory to reduce AC track sq...

Data storage device defining track trajectory to reduce AC track sq...

Data storage device generating PES RRO and data sector squeeze RRO...

Control method for magnetic disk device, magnetic disk device, and...

Method of servo writing for magnetic recording system, magnetic rec...

Magnetic disk degaussing device and degaussing method

Magnetic disk apparatus having an adjustable mechanism to compensat...

Thermal assist head slider

Magnetic head tester and method of manufacturing magnetic disk drive

Perpendicular hard disk drive resistive against external magnetic f...

Alternative DC-burst servo pattern for perpendicular recording

Magnetic disk drive

Method of servo writing for magnetic recording system, magnetic rec...

Servo information recording method, magnetic recording media, and m...

Stray field detector, magnetic disk drive, and method of head escaping

Magnetic head with high reliability of the data protection, magneti...

Magnetic hard disk drive

Magnetic recording apparatus

Method of servo writing for magnetic recording system, magnetic rec...

Magnetic recording apparatus

Magnetic disk device having a write head to write by shifting in a...

Magnetic recording apparatus, magnetic recording medium and magneti...

Magnetic disk apparatus having an adjustable mechanism to compensat...

MAGNETIC HEAD WITH HIGH RELIABILITY OF THE DATA PROTECTION, MAGNETI...

Magnetic recording/reproducing device

Magnetic disk drive

Magnetic recording disk drive

Magnetic hard disk drive

Magnetic disk drive

Magnetic disk drive

Patents Applicationslast 30 patents

DATA STORAGE DEVICE DEFINING TRACK TRAJECTORY TO REDUCE AC TRACK SQ...

Control Method for Magnetic Disk Device, Magnetic Disk Device, and...

Method of servo writing for magnetic recording system, magnetic rec...

Manufacturing method for magnetic disk drive

Method of producing a magnetic disk device with servo data recorded...

Method of servo pattern writing on recording surface and data stora...

Magnetic disk degaussing device and degaussing method

Magnetic head tester and method of manufacturing magnetic disk drive

Magnetic recording head and magnetic disk storage apparatus mountin...

Magnetic disk drive

Method of servo writing for magnetic recording system, magnetic rec...

Servo information recording method, magnetic recording media, and m...

Magnetic disk apparatus having an adjustable mechanism to compensat...

Thermal assist head slider

Magnetic recording medium, method of manufacturing the magnetic rec...

Perpendicular hard disk drive resistive against external magnetic f...

Magnetic head with high reliability of the data protection, magneti...

Stray field detector, magnetic disk drive, and method of head escaping

Magnetic recording apparatus

Magnetic hard disk drive

Magnetic recording apparatus, magnetic recording medium and magneti...

Altermatove DC-burstservo pattern for perpendicular recording

Method and apparatus for data reproducing in information storage sy...

Magnetic head with high reliability of the data protection, magneti...

Magnetic recording disk drive

Magnetic disk apparatus having an adjustable mechanism to compensat...

Magnetic recording apparatus

Magnetic disk drive

Magnetic disk apparatus, magnetic recording medium and method of se...

Method for reproducing information on a recording medium