Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8787125 | Disk drive calibrating fly height actuator to enable laser biasing during non-write mode | — | 2014-07-22 |
| 7859782 | Selecting highest reliability sync mark in a sync mark window of a spiral servo track crossing | — | 2010-12-28 |
| 7499236 | Calibrating correlation between PES and off-track displacement by processing high frequency signal in spiral track | Siri S. Weerasooriya, Harry S. Hvostov | 2009-03-03 |
| 7468855 | Servo writing a disk drive from a number of spiral tracks equal to a non-integer multiple of product servo wedges | Siri S. Weerasooriya | 2008-12-23 |
| 7440210 | Servo writing a disk drive by writing multi-bit sync marks in spiral tracks for improved servo writing | — | 2008-10-21 |
| 7433143 | Adjusting track density by changing slope of spiral tracks used to servo write a disk drive | Wing Ying, Jack M. Chue, Siri S. Weerasooriya | 2008-10-07 |
| 7391583 | Fault tolerant sync mark detection while servo writing a disk drive from spiral tracks | Edgar D. Sheh | 2008-06-24 |
| 7301717 | Servo writing a disk drive by integrating a spiral track read signal | Siri S. Weerasooriya | 2007-11-27 |
| 7248426 | Servo writing a disk drive from spiral tracks by shifting a demodulation window an integer number of sync mark intervals | Siri S. Weerasooriya | 2007-07-24 |
| 7212364 | Servo writing a disk drive by synchronizing a servo write clock in response to a sync mark reliability metric | — | 2007-05-01 |
| 7113362 | Servo writing a disk drive by processing spiral tracks in an interleaved manner | Siri S. Weerasooriya | 2006-09-26 |
| 7068461 | Servo writing a disk drive by overwriting a harmonic frequency fill pattern in the servo burst area | Jack M. Chue, Siri S. Weerasooriya | 2006-06-27 |
| 7068459 | Adjusting track density by changing PES algorithm when servo writing a disk drive from spiral tracks | Robert L. Cloke, Siri S. Weerasooriya, Edgar D. Sheh, Wing Ying | 2006-06-27 |
| 6989954 | Demodulating servo sectors and spiral tracks using common circuitry | Robert L. Cloke, Siri S. Weerasooriya | 2006-01-24 |
| 6987636 | Adjusting track density over disk radius by changing slope of spiral tracks used to servo write a disk drive | Jack M. Chue, Siri S. Weerasooriya | 2006-01-17 |
| 6967799 | Servo writing a disk drive from spiral tracks by generating a time-stamped sync mark detect signal processed by timing recovery firmware | — | 2005-11-22 |
| 6965489 | Using an external spiral servo writer to write reference servo sectors and spiral tracks to a disk to facilitate writing product servo sectors to the disk | Robert L. Cloke, Siri S. Weerasooriya | 2005-11-15 |
| 6943978 | Servo writing a disk drive by synchronizing a servo write clock to a high frequency signal in a spiral track | — | 2005-09-13 |
| 6512649 | Method for differentially writing to a memory disk | Roberto Alini, Quocdzung T. Lam, Xiaokun Chew, Mark R. McCornack, David J. Bezinque +3 more | 2003-01-28 |