Yasuna; Kei

Patent Applications and Registrations

Patent applications and USPTO patent grants for Yasuna; Kei.The latest application filed is for "servo pattern compatible with planarization constraints of patterned media and use of a single master template".

Company Profile

3.30.20

Yasuna; Kei - Kanagawa JP
Yasuna; Kei - Fujisawa JP
- Fujisawa JP
Yasuna; Kei - Fujisawa-shi JP
Yasuna; Kei - Chiyoda 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 employing triangle-like dither to spread track squeeze Grant 10,923,146 - Guo , et al. February 16, 2	2021-02-16
Disk drive and method of writing servo write tracks to a disk Grant 8,873,183 - Yasuna , et al. October 28, 2	2014-10-28
Servo pattern compatible with planarization constraints of patterned media and use of a single master template Grant 8,743,496 - Nonaka , et al. June 3, 2	2014-06-03
Servo pattern compatible with planarization constraints of patterned media and use of a single master template Grant 8,670,207 - Nonaka , et al. March 11, 2	2014-03-11
Patterned media with an alternating series of concentric servo zones and overlap zones Grant 8,630,051 - Nonaka , et al. January 14, 2	2014-01-14
Patterned media with an alternating series of concentric servo zones and overlap zones Grant 8,625,219 - Nonaka , et al. January 7, 2	2014-01-07
Patterned media with an alternating series of concentric servo zones and overlap zones Grant 8,619,379 - Nonaka , et al. December 31, 2	2013-12-31
Patterned media with an alternating series of concentric servo zones and overlap zones Grant 08619379 -	2013-12-31
Method and apparatus for positioning a magnetic-recording head Grant 8,559,126 - Yasuna , et al. October 15, 2	2013-10-15
Patterned media with an alternating series of concentric servo zones and overlap zones Grant 8,531,794 - Nonaka , et al. September 10, 2	2013-09-10
Servo patterning compatible with planarization of patterned magnetic disks Grant 8,526,132 - Albrecht , et al. September 3, 2	2013-09-03
Patterned Media With An Alternating Series Of Concentric Servo Zones And Overlap Zones App 20130010388 - Nonaka; Keiichiro ; et al.	2013-01-10
Servo Pattern Compatible With Planarization Constraints Of Patterned Media And Use Of A Single Master Template App 20130010384 - Nonaka; Keiichiro ; et al.	2013-01-10
Servo Pattern Compatible With Planarization Constraints Of Patterned Media And Use Of A Single Master Template App 20130010385 - Nonaka; Keiichiro ; et al.	2013-01-10
Patterned Media With An Alternating Series Of Concentric Servo Zones And Overlap Zones App 20130010389 - Nonaka; Keiichiro ; et al.	2013-01-10
Patterned Media With An Alternating Series Of Concentric Servo Zones And Overlap Zones App 20130010382 - Nonaka; Keiichiro ; et al.	2013-01-10
Patterned Media With An Alternating Series Of Concentric Servo Zones And Overlap Zones App 20130010383 - Nonaka; Keiichiro ; et al.	2013-01-10
Method for writing servo patterns and disk drive including a controller for writing servo patterns according to the method Grant 8,085,489 - Hattori , et al. December 27, 2	2011-12-27
Method for writing servo data to a disk and disk drive configured to write servo data utilizing the method Grant 8,023,220 - Yoshioka , et al. September 20, 2	2011-09-20
Servo Patterning Compatible With Planarization Of Patterned Magnetic Disks App 20110188149 - Albrecht; Thomas R. ; et al.	2011-08-04
Disk Drive And Method Of Writing Servo Write Tracks To A Disk App 20110141599 - Yasuna; Kei ; et al.	2011-06-16
Method For Writing Servo Data To A Disk And Disk Drive Configured To Write Servo Data Utilizing The Method App 20110080672 - Yoshioka; Masaki ; et al.	2011-04-07
Method And Apparatus For Positioning A Magnetic-recording Head App 20110063751 - YASUNA; Kei ; et al.	2011-03-17
Method For Writing Servo Patterns And Disk Drive Including A Controller For Writing Servo Patterns According To The Method App 20100033868 - HATTORI; Ryohheita ; et al.	2010-02-11
Method of writing pattern in disk, method of following track on disk, and apparatus for writing pattern in disk Grant 7,646,561 - Takasaki , et al. January 12, 2	2010-01-12
Method for forming servo pattern and magnetic disk drive App 20090009904 - Yasuna; Kei ; et al.	2009-01-08
Method of writing pattern in disk, method of following track on disk, and apparatus for writing pattern in disk App 20080068741 - Takasaki; Kohji ; et al.	2008-03-20
Magnetic disk apparatus and servo signal recording method Grant 7,116,509 - Yasuna , et al. October 3, 2	2006-10-03
Magnetic disk apparatus and servo pattern recording method therefor Grant 7,085,084 - Yasuna , et al. August 1, 2	2006-08-01
Magnetic disk device and servo write method Grant 6,999,261 - Sugiyama , et al. February 14, 2	2006-02-14
Servo pattern recording method Grant 6,970,320 - Sugiyama , et al. November 29, 2	2005-11-29
Magnetic disk apparatus and its servo signal recording method Grant 6,906,884 - Yasuna , et al. June 14, 2	2005-06-14
Magnetic disk apparatus and servo signal recording method Grant 6,888,696 - Yasuna , et al. May 3, 2	2005-05-03
Magnetic disk apparatus and servo pattern recording method therefor App 20050052769 - Yasuna, Kei ; et al.	2005-03-10
Magnetic disk apparatus and servo signal recording method App 20040190184 - Yasuna, Kei ; et al.	2004-09-30
Servo pattern recording method App 20040120067 - Sugiyama, Kenichiro ; et al.	2004-06-24
Magnetic disc apparatus having actuator for head positioning mechanism Grant 6,636,385 - Yasuna , et al. October 21, 2	2003-10-21
Information recording disk apparatus Grant 6,597,532 - Usui , et al. July 22, 2	2003-07-22
Magnetic disk apparatus and its servo signal recording method App 20030043494 - Yasuna, Kei ; et al.	2003-03-06
Magnetic disk device and servo write method App 20020186494 - Sugiyama, Kenichiro ; et al.	2002-12-12
Magnetic disk apparatus and servo signal recording method App 20020105751 - Yasuna, Kei ; et al.	2002-08-08
Magnetic disc apparatus and mobile information device App 20010015876 - Yasuna, Kei ; et al.	2001-08-23

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