Issued Patents All Time
Showing 51–75 of 83 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7283321 | Disk drives and methods allowing for dual stage actuator adaptive seek control and microactuator gain calibration | Yu Sun, Yunfeng Li, Paul H. Yeagle | 2007-10-16 |
| 7253987 | Disturbance signal reduction in servo systems | David Shim, Jong Lin | 2007-08-07 |
| 7230789 | Method and apparatus for performing a self-servo write operation in a disk drive using spiral servo information | Don Brunnett, Yu Sun | 2007-06-12 |
| 7215499 | Multi-stage actuator disk drive and methods for controlling a transducer with settle-switching state dependent feed-forward control | Yunfeng Li, Yu Sun, Xiaoping Hu | 2007-05-08 |
| 7161759 | Self servo writing using servo burst edge errors for compound error correction | Xiao Zhang | 2007-01-09 |
| 7158325 | Disk drive head touchdown detection with improved discrimination | Xiaoping Hu, Yu Sun, Don Brunnett | 2007-01-02 |
| 7154689 | Apparatus for writing servo bursts on a disk with servo track pitch based on read element width and methods of manufacturing same | Stanley H. Shepherd, Yu Sun, John VanLaanen | 2006-12-26 |
| 7149044 | Methods, apparatus and computer program products for writing tracks on a disk based on an available stroke | Yuan Chen, Brian P. Rigney, Don Brunnett, Yu Sun, Stanley H. Shepherd | 2006-12-12 |
| 7145745 | Multi-stage actuator disk drives, methods, and computer program products that compensate for repeatable runout based on estimated secondary actuator position | Stan Shepherd, Jason Adler, Xiaoping Hu, Yu Sun | 2006-12-05 |
| 7126785 | Multi-stage actuator disk drives, methods, and computer program products for seeking and then maintaining a transducer on track | Yunfeng Li, Yu Sun | 2006-10-24 |
| 7116513 | Positioning transducers based on a compensation scheme that varies based on transducer vibrational state | Yu Sun, Xiaoping Hu | 2006-10-03 |
| 7106542 | Method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing a disk drive | Yu Sun, Don Brunnett, Georgie Tan, John C. Purkett | 2006-09-12 |
| 7054096 | Method and apparatus for determining embedded runout correction values | Yu Sun, Don Brunnett | 2006-05-30 |
| 7050259 | High precision servo track writing with position error signal feedback | David M. Tung, Heng-Poh Khong | 2006-05-23 |
| 7050260 | Method and apparatus for partial self-servo writing using servo wedge propagation | David M. Tung, Don Brunnett | 2006-05-23 |
| 7035041 | Displacement resetting systems and methods for the second stage of a hard disk drive dual-stage actuator | Xiaoping Hu, Wei Guo | 2006-04-25 |
| 7027253 | Microactuator servo control during self writing of servo data | Yu Sun, Yunfeng Li | 2006-04-11 |
| 7012780 | Disk drive and methods that calibrate micro actuator positioning before seek operations | Xiaoping Hu, Yu Sun, Donald Brunett | 2006-03-14 |
| 6977790 | Design scheme to increase the gain of strain based sensors in hard disk drive actuators | Yih-Jen D. Chen, David M. Tung, Wei Guo, Bill Wang | 2005-12-20 |
| 6975477 | Micro actuator DC gain calibration scheme for HDD dual-stage actuator systems | Xiaoping Hu, Wei Guo, Jong-Ming Lin | 2005-12-13 |
| 6975482 | Settle control systems and methods for the second stage of a dual stage actuator | Xiaoping Hu | 2005-12-13 |
| 6938326 | Method of making at least one suspension load beam for an actuator assembly of a disk drive | Y. J. Chen | 2005-09-06 |
| 6867949 | Vibration-damped push-pin assembly for disk drive servo writing | David M. Tung, Xiaoping Hu, Wei Guo, William Marvin, Mark S. Seymour | 2005-03-15 |
| 6798610 | Disk drive with self servo writing capability | Youping Deng | 2004-09-28 |
| 6744577 | Piezoelectric actuator and shock sensor | Douglas C. Martin, Jye-Kai Chang | 2004-06-01 |