Issued Patents All Time
Showing 25 most recent of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9025269 | Disk drive compensating for cycle slip of disk locked clock when reading mini-wedge | Richard K. Wong, Sanghoon Chu, Guoxiao Guo, Carl E. Barlow, Wei Guo +1 more | 2015-05-05 |
| 8482873 | Disk drive employing pulse width modulation of head control signal | Tomas D. Hugunin, William D. Huber | 2013-07-09 |
| 7916415 | Disk drive decoding binary sequence from phases of servo bursts | — | 2011-03-29 |
| 7869160 | Perpendicular recording head with shaped pole surfaces for higher linear data densities | Tao Pan, Kroum S. Stoev, Yugang Wang | 2011-01-11 |
| 7839595 | Feed forward compensation for fly height control in a disk drive | Tomas D. Hugunin | 2010-11-23 |
| 7710676 | Disk drive comprising gray code implemented with servo bursts | — | 2010-05-04 |
| 7518819 | Disk drive rewriting servo sectors by writing and servoing off of temporary servo data written in data sectors | Jie Yu, Guoxiao Guo | 2009-04-14 |
| 7502197 | Disk drive demodulating a time-based servo pattern | — | 2009-03-10 |
| 7433143 | Adjusting track density by changing slope of spiral tracks used to servo write a disk drive | Wing Ying, Siri S. Weerasooriya, Tehri S. Lee | 2008-10-07 |
| 7330327 | Servo writing a disk drive by writing discontinuous spiral tracks to prevent overheating | Siri S. Weerasooriya, Jai N. Subrahmanyam | 2008-02-12 |
| 7184230 | System and method for processing track identifier errors to mitigate head instability in data storage devices | Jai N. Subrahmanyam, Russ A. Quisenberry | 2007-02-27 |
| 7180703 | Disk drive comprising a spindle motor employing anionic/cationic lubricant to reduce disk surface potential | Jai N. Subrahmanyam | 2007-02-20 |
| 7136242 | Servo writing substantially linear servo wedges to reduce overwrite effect in perpendicular magnetic recording | William C. Tipton, II, Daniel B. Razum | 2006-11-14 |
| 7099117 | Head stack assembly including a trace suspension assembly backing layer and a ground trace for grounding a slider | Jai N. Subrahmanyam, Gopalakrishna Kote, Kathy X. Tang, Loi Dac Pham | 2006-08-29 |
| 7099095 | Track identification codewords having multiple bit error correction capability and generalized gray code property | Jai N. Subrahmanyam | 2006-08-29 |
| 7068461 | Servo writing a disk drive by overwriting a harmonic frequency fill pattern in the servo burst area | Siri S. Weerasooriya, Tehri S. Lee | 2006-06-27 |
| 7050249 | System and method for processing track identification data in a disk drive | Jai N. Subrahmanyam | 2006-05-23 |
| 7035026 | Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writer | Raffi Codilian, William D. Johns, Charles A. Park, David D. Nguyen | 2006-04-25 |
| 7027256 | Disk drive having servo sectors that store repeatable runout correction values and related error correction code data | Jai N. Subrahmanyam, Robert J. McNab | 2006-04-11 |
| 7027264 | Slider with a slider ground pad electrically connected to write head poles and read head shields | Jai N. Subrahmanyam, Gopalakrishna Kote, Kathy X. Tang, Loi Dac Pham | 2006-04-11 |
| 7016134 | Using an external spiral servo writer to write spiral tracks to a disk to facilitate writing product servo sectors to the disk | Vinay K. Agarwal, Robert L. Cloke | 2006-03-21 |
| 6987636 | Adjusting track density over disk radius by changing slope of spiral tracks used to servo write a disk drive | Siri S. Weerasooriya, Tehri S. Lee | 2006-01-17 |
| 6972922 | Disk drive having internal data structures for efficiently storing repeatable runout cancellation information | Jai N. Subrahmanyam, Robert J. McNab | 2005-12-06 |
| 6943972 | Selecting a track density for each disk surface of a disk drive based on head characteristic | William C. Tipton, II, David Price Turner | 2005-09-13 |
| 6885514 | Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writer | Raffi Codilian, William D. Johns, Charles A. Park, David D. Nguyen | 2005-04-26 |