Siri S. Weerasooriya

Person

Campbell, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Disk drive that efficiently handles random mixed-R/W command-streams
- Patent number 10,678,442
- Issue date Jun 9, 2020
- Kabushiki Kaisha Toshiba
- Takeyori Hara
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Disk drive that efficiently handles random mixed-R/W command-streams
- Patent number 10,198,188
- Issue date Feb 5, 2019
- Kabushiki Kaisha Toshiba
- Takeyori Hara
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Data storage device measuring reader/writer offset by reading spira...
- Patent number 9,245,560
- Issue date Jan 26, 2016
- Western Digital Technologies, Inc.
- Jianbin Nie
- G11 - INFORMATION STORAGE
Information Patent Grant
Data storage device attenuating interference from first spiral trac...
- Patent number 9,208,810
- Issue date Dec 8, 2015
- Western Digital Technologies, Inc.
- Jianbin Nie
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive writing radial offset spiral servo tracks by reading spi...
- Patent number 9,076,490
- Issue date Jul 7, 2015
- Western Digital Technologies, Inc.
- Jianbin Nie
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive measuring spiral track error by measuring a slope of a s...
- Patent number 9,047,901
- Issue date Jun 2, 2015
- Western Digital Technologies, Inc.
- Jianbin Nie
- G11 - INFORMATION STORAGE
Information Patent Grant
Data storage device reading first spiral track while simultaneously...
- Patent number 8,982,490
- Issue date Mar 17, 2015
- Western Digital Technologies, Inc.
- Charles A. Park
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive calibrating a velocity profile prior to writing a spiral...
- Patent number 8,917,474
- Issue date Dec 23, 2014
- Western Digital Technologies, Inc.
- Brian P. Rigney
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive adapting feed-forward compensation using iterative learn...
- Patent number 8,902,535
- Issue date Dec 2, 2014
- Western Digital Technologies, Inc.
- Jianbin Nie
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive performing spiral scan of disk surface to detect residua...
- Patent number 8,896,957
- Issue date Nov 25, 2014
- Western Digital Technologies, Inc.
- Yap Han Ng
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive servoing on first disk surface while erasing second disk...
- Patent number 8,861,123
- Issue date Oct 14, 2014
- Western Digital Technologies, Inc.
- Edmund Ooi Huat Lye
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive detecting when head is on ramp
- Patent number 8,786,976
- Issue date Jul 22, 2014
- Western Digital Technologies, Inc.
- Soo-Choon Kang
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive compensating for track squeeze by writing non-circular s...
- Patent number 8,749,904
- Issue date Jun 10, 2014
- Western Digital Technologies, Inc.
- Jiangang Liang
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive employing overlapping servo zones to facilitate servo zo...
- Patent number 8,724,245
- Issue date May 13, 2014
- Western Digital Technologies, Inc.
- Steven C. Smith
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive adjusting demodulation window for spiral track using tim...
- Patent number 8,724,253
- Issue date May 13, 2014
- Western Digital Technologies, Inc.
- Jiangang Liang
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive detecting touchdown event by evaluating frequency respon...
- Patent number 8,699,173
- Issue date Apr 15, 2014
- Western Digital Technologies, Inc.
- Soo-Choon Kang
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive estimating repeatable runout of reference pattern based...
- Patent number 8,670,206
- Issue date Mar 11, 2014
- Western Digital Technologies, Inc.
- Jiangang Liang
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive adjusting gain and offset of BEMF velocity sensor during...
- Patent number 8,665,551
- Issue date Mar 4, 2014
- Western Digital Technologies, Inc.
- Brian P. Rigney
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive performing in-drive spiral track writing
- Patent number 8,634,283
- Issue date Jan 21, 2014
- Western Digital Technologies, Inc.
- Brian P. Rigney
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive writing spiral tracks on a slave surface using repeatabl...
- Patent number 8,537,486
- Issue date Sep 17, 2013
- Western Digital Technologies, Inc.
- Jiangang Liang
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive centering demodulation windows on spiral tracks during a...
- Patent number 8,451,697
- Issue date May 28, 2013
- Western Digital Technologies, Inc.
- Brian P. Rigney
- G11 - INFORMATION STORAGE
Information Patent Grant
Spiral slope approximation of spiral patterns written to a disk of...
- Patent number 7,852,592
- Issue date Dec 14, 2010
- Western Digital Technologies, Inc.
- Jiangang Liang
- G11 - INFORMATION STORAGE
Information Patent Grant
Servoing on concentric servo sectors of a first disk surface to wri...
- Patent number 7,843,662
- Issue date Nov 30, 2010
- Western Digital Technologies, Inc.
- Siri S. Weerasooriya
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive comprising index spiral track identified by change in sy...
- Patent number 7,839,591
- Issue date Nov 23, 2010
- Western Digital Technologies, Inc.
- Siri S. Weerasooriya
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive detecting defective spiral servo track
- Patent number 7,746,592
- Issue date Jun 29, 2010
- Western Digital Technologies, Inc.
- Jiangang Liang
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive self servo writing spiral tracks by propagating bursts
- Patent number 7,688,539
- Issue date Mar 30, 2010
- Western Digital Technologies, Inc.
- Lawrence M. Bryant
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive demodulating a spiral track by finding a maximum correla...
- Patent number 7,656,604
- Issue date Feb 2, 2010
- Western Digital Technologies, Inc.
- Jiangang Liang
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk drive adjusting estimated reader/writer offset to achieve targ...
- Patent number 7,602,575
- Issue date Oct 13, 2009
- Western Digital Technologies, Inc.
- Yakov M. Lifchits
- G11 - INFORMATION STORAGE
Information Patent Grant
Calibrating correlation between PES and off-track displacement by p...
- Patent number 7,499,236
- Issue date Mar 3, 2009
- Western Digital Technologies, Inc.
- Tehri S. Lee
- G11 - INFORMATION STORAGE
Information Patent Grant
Servo writing a disk drive using a secondary actuator to control sk...
- Patent number 7,489,464
- Issue date Feb 10, 2009
- Western Digital Technologies, Inc.
- Robert J. McNab
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
DISK DRIVE THAT EFFICIENTLY HANDLES RANDOM MIXED-R/W COMMAND-STREAMS
- Publication number 20190163368
- Publication date May 30, 2019
- Kabushiki Kaisha Toshiba
- Takeyori HARA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DISK DRIVE THAT EFFICIENTLY HANDLES RANDOM MIXED-R/W COMMAND-STREAMS
- Publication number 20180260115
- Publication date Sep 13, 2018
- Kabushiki Kaisha Toshiba
- Takeyori HARA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DISK DRIVE WRITING SPIRAL TRACKS ON A SLAVE SURFACE USING REPEATABL...
- Publication number 20130038959
- Publication date Feb 14, 2013
- WESTERN DIGITAL TECHNOLOGIES, INC.
- JIANGANG LIANG
- G11 - INFORMATION STORAGE

Siri S. Weerasooriya

Person

Patents Grantslast 30 patents

Disk drive that efficiently handles random mixed-R/W command-streams

Disk drive that efficiently handles random mixed-R/W command-streams

Data storage device measuring reader/writer offset by reading spira...

Data storage device attenuating interference from first spiral trac...

Disk drive writing radial offset spiral servo tracks by reading spi...

Disk drive measuring spiral track error by measuring a slope of a s...

Data storage device reading first spiral track while simultaneously...

Disk drive calibrating a velocity profile prior to writing a spiral...

Disk drive adapting feed-forward compensation using iterative learn...

Disk drive performing spiral scan of disk surface to detect residua...

Disk drive servoing on first disk surface while erasing second disk...

Disk drive detecting when head is on ramp

Disk drive compensating for track squeeze by writing non-circular s...

Disk drive employing overlapping servo zones to facilitate servo zo...

Disk drive adjusting demodulation window for spiral track using tim...

Disk drive detecting touchdown event by evaluating frequency respon...

Disk drive estimating repeatable runout of reference pattern based...

Disk drive adjusting gain and offset of BEMF velocity sensor during...

Disk drive performing in-drive spiral track writing

Disk drive writing spiral tracks on a slave surface using repeatabl...

Disk drive centering demodulation windows on spiral tracks during a...

Spiral slope approximation of spiral patterns written to a disk of...

Servoing on concentric servo sectors of a first disk surface to wri...

Disk drive comprising index spiral track identified by change in sy...

Disk drive detecting defective spiral servo track

Disk drive self servo writing spiral tracks by propagating bursts

Disk drive demodulating a spiral track by finding a maximum correla...

Disk drive adjusting estimated reader/writer offset to achieve targ...

Calibrating correlation between PES and off-track displacement by p...

Servo writing a disk drive using a secondary actuator to control sk...

Patents Applicationslast 30 patents

DISK DRIVE THAT EFFICIENTLY HANDLES RANDOM MIXED-R/W COMMAND-STREAMS

DISK DRIVE THAT EFFICIENTLY HANDLES RANDOM MIXED-R/W COMMAND-STREAMS

DISK DRIVE WRITING SPIRAL TRACKS ON A SLAVE SURFACE USING REPEATABL...