Semba; Tetsuo

Patent Applications and Registrations

Patent applications and USPTO patent grants for Semba; Tetsuo.The latest application filed is for "method and structure for improving performance and storage density in a data storage device".

Company Profile

1.51.31

Semba; Tetsuo - Zama JP
Semba; Tetsuo - San Jose CA
Semba; Tetsuo - Kanagawa-ken JP
Semba, Tetsuo - Zama-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 employing nominal and adaptive multi-actuator decoupler Grant 10,410,657 - Zhou , et al. Sept	2019-09-10
Data storage device attenuating multiple actuator coupling disturbance Grant 9,934,803 - Semba , et al. April 3, 2	2018-04-03
Data storage device communicating servo information between servo channels of multiple actuators Grant 9,792,938 - Kobayashi , et al. October 17, 2	2017-10-17
Magnetic recording disk drive with position error signal (PES) blocks in the data tracks for compensation of track misregistration Grant 9,412,403 - Dhanda , et al. August 9, 2	2016-08-09
Magnetic recording disk drive with adjustable data track pitch and compensation for repeatable runout (RRO) Grant 9,349,400 - Dhanda , et al. May 24, 2	2016-05-24
Method and structure for improving performance and storage density in a data storage device Grant 9,324,368 - Dhanda , et al. April 26, 2	2016-04-26
Two-dimensional magnetic recording (TDMR) disk drive with varying servo track pitch Grant 9,286,926 - Dhanda , et al. March 15, 2	2016-03-15
Method And Structure For Improving Performance And Storage Density In A Data Storage Device App 20150138666 - Dhanda; Abhishek ; et al.	2015-05-21
Write current and fly height adjustment for compensating media coercivity variation Grant 9,025,263 - Dhanda , et al. May 5, 2	2015-05-05
Method and structure for improving performance and storage density in a data storage device Grant 8,953,266 - Dhanda , et al. February 10, 2	2015-02-10
Write Current And Fly Height Adjustment For Compensating Media Coercivity Variation App 20150036235 - Dhanda; Abhishek ; et al.	2015-02-05
Implementing Data Frequency And Data Bits Per Sector (bps) Calibration For Non-circular Disk Tracks App 20140320995 - Dhanda; Abhishek ; et al.	2014-10-30
Heat-assisted magnetic recording disk drive (HAMR) with thermal sensor and laser power prediction Grant 8,842,507 - Hirano , et al. September 23, 2	2014-09-23
Magnetic recording disk drive with frequency adjustment for misaligned servo patterns Grant 8,817,405 - Dhanda , et al. August 26, 2	2014-08-26
Disk Drive Write-Inhibit Control Using Adaptive PES Predictor App 20140168806 - Dhanda; Abhishek ; et al.	2014-06-19
Magnetic recording disk with patterned nondata islands with different sizes and opposite polarity and method for making the disk Grant 8,737,002 - Dhanda , et al. May 27, 2	2014-05-27
Method and apparatus for compensating vibration by adjusting track pitch Grant 8,724,248 - Dhanda , et al. May 13, 2	2014-05-13
Thermal read/write offset compensation Grant 8,699,165 - Huang , et al. April 15, 2	2014-04-15
Method for creating burst magnitude servo patterns with unipolar bits on a magnetic media of a magnetic data recording system Grant 8,665,549 - Albrecht , et al. March 4, 2	2014-03-04
Method And Structure For Improving Performance And Storage Density In A Data Storage Device App 20140055883 - Dhanda; Abhishek ; et al.	2014-02-27
Adjusting VGA analog gain for misaligned servo sectors in a disk drive Grant 8,625,231 - Dhanda , et al. January 7, 2	2014-01-07
Implementing Data Track Pitch Adjustment Under Operational Vibration Conditions App 20130135764 - Dhanda; Abhishek ; et al.	2013-05-30
Method For Creating Burst Magnitude Servo Patterns With Unipolar Bits On A Magnetic Media Of A Magnetic Data Recording System App 20130083420 - Albrecht; Thomas R. ; et al.	2013-04-04
Magnetic recording disk drive with rotational vibration compensation having adaptive optimization of vibration sensor gains Grant 8,379,342 - Huang , et al. February 19, 2	2013-02-19
Patterned media with structured PES servo segments encoding local track position Grant 8,363,348 - Hirano , et al. January 29, 2	2013-01-29
Patterned media with structured PES servo segments encoding local track position App 20120087037 - Hirano; Toshiki ; et al.	2012-04-12
Thermal Read/write Offset Compensation App 20120002314 - Huang; Lidu ; et al.	2012-01-05
Apparatus and method for adjusting a feed-forward signal for seek control during a seek operation Grant 7,826,170 - Semba November 2, 2	2010-11-02
Magnetic Recording Disk Drive With Rotational Vibration Compensation Having Adaptive Optimization Of Vibration Sensor Gains App 20100067357 - Huang; Fu-Ying ; et al.	2010-03-18
Apparatus And Method For Adjusting A Feed-forward Signal For Seek Control During A Seek Operation App 20100067342 - SEMBA; Tetsuo	2010-03-18
Disk drive with hybrid analog-digital acceleration feedforward control system and method for rejecting rotational vibration Grant 7,580,217 - Abe , et al. August 25, 2	2009-08-25
Disk drive with support structure for air dams and disk-vibration capacitive sensors Grant 7,499,243 - Hirano , et al. March 3, 2	2009-03-03
Hard disk drive vibration cancellation using adaptive filter Grant 7,486,470 - Semba February 3, 2	2009-02-03
Minimizing a mechanical mode excitation utilizing a generated seek trajectory Grant 7,486,469 - Semba February 3, 2	2009-02-03
Head seek control method suppressing vibrations and rotatary recorder/reproducer Grant 7,457,076 - Semba , et al. November 25, 2	2008-11-25
Disk drive with support structure for damping plates and disk-vibration capacitive sensors Grant 7,450,339 - Hirano , et al. November 11, 2	2008-11-11
Reducing read/write head track misregistration Grant 7,450,335 - Hirano , et al. November 11, 2	2008-11-11
Disk Drive With Hybrid Analog-digital Acceleration Feedforward Control System And Method For Rejecting Rotational Vibration App 20080158722 - Abe; Jirou ; et al.	2008-07-03
Magnetic recording disk drive with multiple feedforward controllers for rotational vibration cancellation Grant 7,375,916 - Semba , et al. May 20, 2	2008-05-20
Disk drive using a disturbance sensor for disturbance frequency-identification and suppression Grant 7,345,841 - Baugh , et al. March 18, 2	2008-03-18
Disk Drive With Support Structure For Air Dams And Disk-vibration Capacitive Sensors App 20080037162 - Hirano; Toshiki ; et al.	2008-02-14
Disk Drive With Support Structure For Damping Plates And Disk-vibration Capacitive Sensors App 20080037161 - Hirano; Toshiki ; et al.	2008-02-14
Reducing read/write head track misregistration App 20080037155 - Hirano; Toshiki ; et al.	2008-02-14
Disk drive with support structure for disk-vibration capacitive sensors Grant 7,292,407 - Hirano , et al. November 6, 2	2007-11-06
Dual-stage actuator disk drive with optimal location of the movable portion of the secondary actuator Grant 7,277,258 - Hirano , et al. October 2, 2	2007-10-02
Magnetic recording disk drive with multiple feedforward controllers for rotational vibration cancellation App 20070217052 - Semba; Tetsuo ; et al.	2007-09-20
Vibration suppression for servo control Grant 7,268,968 - Semba , et al. September 11, 2	2007-09-11
Disk Drive Using A Disturbance Sensor For Disturbance Frequency-identification And Suppression App 20070183076 - Baugh; Eric Gordon ; et al.	2007-08-09
Seek trajectory generation using adaptive filtering Grant 7,206,162 - Semba , et al. April 17, 2	2007-04-17
Magnetic recording disk drive with switchable rotational vibration cancellation Grant 7,177,113 - Semba , et al. February 13, 2	2007-02-13
Magnetic Recording Disk Drive With Switchable Rotational Vibration Cancellation App 20070030768 - Semba; Tetsuo ; et al.	2007-02-08
Dual-stage actuator disk drive with optimal location of the movable portion of the secondary actuator App 20060285256 - Hirano; Toshiki ; et al.	2006-12-21
Disk drive with adaptive control of periodic disturbances Grant 7,145,746 - Hirano , et al. December 5, 2	2006-12-05
Magnetic recording disk drive with patterned media and compensation for write-clock timing error caused by rotational disturbances Grant 7,133,229 - Semba November 7, 2	2006-11-07
Concurrent data recording and reproducing method, seek operation control method and magnetic disk drive using the methods Grant 7,126,784 - Tamura , et al. October 24, 2	2006-10-24
Magnetic recording disk drive with patterned media and compensation for write-clock timing error caused by rotational disturbances App 20060176599 - Semba; Tetsuo	2006-08-10
Head seek control method suppressing vibrations and rotatary recorder/reproducer App 20060158773 - Semba; Tetsuo ; et al.	2006-07-20
Dual-stage actuator disk drive with method for secondary-actuator failure detection and recovery using a relative-position sensor while track following Grant 7,079,339 - Semba , et al. July 18, 2	2006-07-18
Dual-stage actuator disk drive with method for secondary-actuator failure detection and recovery while track-following Grant 7,079,338 - Semba , et al. July 18, 2	2006-07-18
Seek trajectory generation using adaptive filtering App 20060114601 - Semba; Tetsuo ; et al.	2006-06-01
Data storage device, control device, off-track control method, and control method Grant 7,035,034 - Semba , et al. April 25, 2	2006-04-25
Vibration Suppression For Servo Control App 20060072392 - Semba; Tetsuo ; et al.	2006-04-06
Disk Drive With Capacitance Sensing Of Disk Vibration And Feedforward Control For Removal Of Read/write Head Track Misregistration App 20060066985 - Hirano; Toshiki ; et al.	2006-03-30
Disk drive with support structure for disk-vibration capacitive sensors App 20060066991 - Hirano; Toshiki ; et al.	2006-03-30
Disk drive with capacitance sensing of disk vibration and feedforward control for removal of read/write head track misregistration Grant 7,012,777 - Hirano , et al. March 14, 2	2006-03-14
Data storage device, command queue re-ordering method, and data processing method and program Grant 7,010,653 - Uchida , et al. March 7, 2	2006-03-07
Rotary recording apparatus and method of controlling the apparatus Grant 6,831,809 - Kagami , et al. December 14, 2	2004-12-14
Data storage device, control device, off-track control method, and control method App 20030231423 - Semba, Tetsuo ; et al.	2003-12-18
Data storage device, command queue re-ordering method, and data processing method and program App 20030225969 - Uchida, Hiroshi ; et al.	2003-12-04
Phase technique for active damping in a servo-controlled actuator Grant 6,614,613 - Huang , et al. September 2, 2	2003-09-02
Rotary recording apparatus and method of controlling the apparatus App 20020159187 - Kagami, Naoyuki ; et al.	2002-10-31
Method and sytem for cancelling optical servo crosstalk in optical disk drives Grant 5,768,228 - Bates , et al. June 16, 1	1998-06-16
Disk storage unit positioning control for applying DC offsets to a tracking error Grant 5,760,991 - Semba June 2, 1	1998-06-02

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