Hamaguchi; Takehiko

Patent Applications and Registrations

Patent applications and USPTO patent grants for Hamaguchi; Takehiko.The latest application filed is for "data storage device defining track trajectory to reduce ac track squeeze".

Company Profile

2.35.36

Hamaguchi; Takehiko - Kangawa JP
Hamaguchi; Takehiko - Kanagawa JP
Hamaguchi; Takehiko - Fuchu JP
Hamaguchi; Takehiko - Odawara JP
Hamaguchi; Takehiko - Tokyo JP
Hamaguchi, Takehiko - Fuchu-shi JP

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Data storage device defining track trajectory to reduce AC track squeeze Grant 11,049,518 - Ide , et al. June 29, 2	2021-06-29
Data Storage Device Defining Track Trajectory To Reduce Ac Track Squeeze App 20200411050 - Ide; Hiroshi ; et al.	2020-12-31
Data storage device defining track trajectory to reduce AC track squeeze Grant 10,699,745 - Ide , et al.	2020-06-30
Data storage device generating PES RRO and data sector squeeze RRO for a plurality of zones Grant 10,607,645 - Hamaguchi , et al.	2020-03-31
Control method for magnetic disk device, magnetic disk device, and magnetic disk Grant 8,049,986 - Ito , et al. November 1, 2	2011-11-01
Method of servo writing for magnetic recording system, magnetic recording system Grant 7,839,590 - Nishida , et al. November 23, 2	2010-11-23
Magnetic disk degaussing device and degaussing method Grant 7,724,490 - Tamura , et al. May 25, 2	2010-05-25
Control Method for Magnetic Disk Device, Magnetic Disk Device, and Magnetic Disk App 20100085657 - Ito; Kenya ; et al.	2010-04-08
Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle Grant 7,545,595 - Hamaguchi , et al. June 9, 2	2009-06-09
Thermal assist head slider Grant 7,525,765 - Kurita , et al. April 28, 2	2009-04-28
Magnetic head tester and method of manufacturing magnetic disk drive Grant 7,518,814 - Umezaki , et al. April 14, 2	2009-04-14
Perpendicular hard disk drive resistive against external magnetic field Grant 7,486,485 - Hamaguchi , et al. February 3, 2	2009-02-03
Method of servo writing for magnetic recording system, magnetic recording system App 20090021854 - Nishida; Yasutaka ; et al.	2009-01-22
Alternative DC-burst servo pattern for perpendicular recording Grant 7,474,493 - Hamaguchi , et al. January 6, 2	2009-01-06
Magnetic disk drive Grant 7,443,625 - Hamaguchi , et al. October 28, 2	2008-10-28
Method of servo writing for magnetic recording system, magnetic recording system Grant 7,436,611 - Nishida , et al. October 14, 2	2008-10-14
Manufacturing method for magnetic disk drive App 20080192379 - Kurita; Masayuki ; et al.	2008-08-14
Method of producing a magnetic disk device with servo data recorded on magnetic disk, head amplifier for magnetic disk device and disk device App 20080186629 - Hamaguchi; Takehiko ; et al.	2008-08-07
Servo information recording method, magnetic recording media, and magnetic disk apparatus Grant 7,365,933 - Hamaguchi , et al. April 29, 2	2008-04-29
Stray field detector, magnetic disk drive, and method of head escaping Grant 7,289,284 - Arai , et al. October 30, 2	2007-10-30
Method of servo pattern writing on recording surface and data storage device App 20070247741 - Akagi; Kyo ; et al.	2007-10-25
Magnetic disk degaussing device and degaussing method App 20070247776 - Tamura; Hitoshi ; et al.	2007-10-25
Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data Grant 7,221,530 - Tomiyama , et al. May 22, 2	2007-05-22
Magnetic head tester and method of manufacturing magnetic disk drive App 20070046286 - Umezaki; Hiroshi ; et al.	2007-03-01
Magnetic hard disk drive Grant 7,184,236 - Hamaguchi , et al. February 27, 2	2007-02-27
Magnetic recording head and magnetic disk storage apparatus mounting the magnetic head App 20060262453 - Mochizuki; Masafumi ; et al.	2006-11-23
Magnetic disk drive App 20060187578 - Hamaguchi; Takehiko ; et al.	2006-08-24
Magnetic recording apparatus Grant 7,092,181 - Nishida , et al. August 15, 2	2006-08-15
Method of servo writing for magnetic recording system, magnetic recording system App 20060171052 - Nishida; Yasutaka ; et al.	2006-08-03
Servo information recording method, magnetic recording media, and magnetic disk apparatus App 20060152843 - Hamaguchi; Takehiko ; et al.	2006-07-13
Method of servo writing for magnetic recording system, magnetic recording system Grant 7,075,743 - Nishida , et al. July 11, 2	2006-07-11
Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle App 20060132957 - Hamaguchi; Takehiko ; et al.	2006-06-22
Thermal assist head slider App 20060119971 - Kurita; Masayuki ; et al.	2006-06-08
Magnetic recording medium, method of manufacturing the magnetic recording medium and a magnetic disk drive using the magnetic recording medium App 20060121317 - Kokaku; Yuichi ; et al.	2006-06-08
Magnetic disk device having a write head to write by shifting in a radial direction Grant 7,057,838 - Hamaguchi , et al. June 6, 2	2006-06-06
Perpendicular hard disk drive resistive against external magnetic field App 20060092556 - Hamaguchi; Takehiko ; et al.	2006-05-04
Magnetic recording apparatus, magnetic recording medium and magnetic recording method Grant 7,031,086 - Nishida , et al. April 18, 2	2006-04-18
Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle Grant 7,027,248 - Hamaguchi , et al. April 11, 2	2006-04-11
Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data App 20060028752 - Tomiyama; Futoshi ; et al.	2006-02-09
Stray field detector, magnetic disk drive, and method of head escaping App 20060028747 - Arai; Reiko ; et al.	2006-02-09
Magnetic recording apparatus App 20050270676 - Nishida, Yasutaka ; et al.	2005-12-08
Magnetic Head With High Reliability Of The Data Protection, Magnetic Disk Apparatus Including The Magnetic Head And The Method Of Recording Information On The Magnetic Disk Apparatus Without Miserasing The Previously Recorded Data Grant 6,940,690 - Tomiyama , et al. September 6, 2	2005-09-06
Magnetic recording/reproducing device Grant 6,909,566 - Zaitsu , et al. June 21, 2	2005-06-21
Magnetic disk drive Grant 6,906,889 - Hamaguchi , et al. June 14, 2	2005-06-14
Magnetic recording disk drive Grant 6,879,460 - Tomiyama , et al. April 12, 2	2005-04-12
Magnetic hard disk drive App 20050036226 - Hamaguchi, Takehiko ; et al.	2005-02-17
Magnetic recording apparatus, magnetic recording medium and magnetic recording method App 20040257690 - Nishida, Yasutaka ; et al.	2004-12-23
Altermatove DC-burstservo pattern for perpendicular recording App 20040252394 - Hamaguchi, Takehiko ; et al.	2004-12-16
Method and apparatus for data reproducing in information storage system App 20040252399 - Maeda, Hideaki ; et al.	2004-12-16
Magnetic hard disk drive Grant 6,822,818 - Hamaguchi , et al. November 23, 2	2004-11-23
Magnetic disk drive Grant 6,760,172 - Hamaguchi , et al. July 6, 2	2004-07-06
Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data App 20040080856 - Tomiyama, Futoshi ; et al.	2004-04-29
Magnetic recording disk drive App 20040075937 - Tomiyama, Futoshi ; et al.	2004-04-22
Magnetic disk drive Grant 6,717,760 - Hamaguchi , et al. April 6, 2	2004-04-06
Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle App 20040027709 - Hamaguchi, Takehiko ; et al.	2004-02-12
Method for reproducing information on a recording medium Grant 6,683,823 - Saga , et al. January 27, 2	2004-01-27
Magnetic recording apparatus App 20030223147 - Nishida, Yasutaka ; et al.	2003-12-04
Method of controlling read write operation of a magnetic disk apparatus Grant 6,657,805 - Nishida , et al. December 2, 2	2003-12-02
Magnetic recording disk drive Grant 6,657,804 - Tomiyama , et al. December 2, 2	2003-12-02
Magnetic disk drive App 20030189774 - Hamaguchi, Takehiko ; et al.	2003-10-09
Magnetic disk apparatus, magnetic recording medium and method of servo waiting App 20030142435 - Tomiyama, Futoshi ; et al.	2003-07-31
Method for reproducing information on a recording medium App 20030123333 - Saga, Hideki ; et al.	2003-07-03
Information recording/reproducing device Grant 6,560,168 - Saga , et al. May 6, 2	2003-05-06
Magnetic disk drive Grant 6,515,817 - Hamaguchi , et al. February 4, 2	2003-02-04
Magnetic disk drive App 20020191328 - Hamaguchi, Takehiko ; et al.	2002-12-19
Magnetic disk drive App 20020131188 - Hamaguchi, Takehiko ; et al.	2002-09-19
Magnetic hard disk drive App 20020060871 - Hamaguchi, Takehiko ; et al.	2002-05-23
Method of servo writing for magnetic recording system, magnetic recording system App 20020057509 - Nishida, Yasutaka ; et al.	2002-05-16
Method of controlling read write operation of a magnetic disk apparatus App 20020030915 - Nishida, Yasutaka ; et al.	2002-03-14
Magnetic disk apparatus with data track reassigning function Grant 6,310,741 - Nishida , et al. October 30, 2	2001-10-30
Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data App 20010030832 - Tomiyama, Futoshi ; et al.	2001-10-18

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