Issued Patents All Time
Showing 26–50 of 76 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9542966 | Data storage devices and methods with frequency-shaped sliding mode control | Minghui Zheng, Masayoshi Tomizuka, Xu Chen, Wei Xi | 2017-01-10 |
| 9454989 | Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary | Michael Chang, Jie Yu | 2016-09-27 |
| 9424871 | Disk drive correcting an error in a detected gray code | Donald Brunnett, Jianguo Zhou, Wai Ee Wong | 2016-08-23 |
| 9343094 | Data storage device filtering burst correction values before downsampling the burst correction values | Kun Ma, Jianyi Wang, Hui Li, Wai Ee Wong | 2016-05-17 |
| 9286925 | Data storage device writing multiple burst correction values at the same radial location | Stanley H. Shepherd, Yakov M. Lifschitz, Min Chen, Jason Laks | 2016-03-15 |
| 9153263 | Disk drive detecting mini wedge by evaluating wedge ID of servo sector | Michael Chang, Wei Guo, Russ A. Quisenberry | 2015-10-06 |
| 9142249 | Disk drive using timing loop control signal for vibration compensation in servo loop | Jianguo Zhou, Donald Brunnett, Min Chen, Wei Guo, Jie Yu | 2015-09-22 |
| 9111575 | Data storage device employing adaptive feed-forward control in timing loop to compensate for vibration | Jianguo Zhou, Wei Xi, Hui Li | 2015-08-18 |
| 9058826 | Data storage device detecting free fall condition from disk speed variations | Wei Guo, Jianguo Zhou, Yiming Chen, Jie Yu | 2015-06-16 |
| 9052701 | Disk drive measuring a resonance mode by injecting sinusoids into a servo control system | QingWei Jia, Shuyu Cao, Jie Yu | 2015-06-09 |
| 9053712 | Data storage device reading servo sector while writing data sector | Russ A. Quisenberry, Wei Guo, Michael Chang, Jie Yu | 2015-06-09 |
| 9047919 | Disk drive initializing servo read channel by reading data preceding servo preamble during access operation | Richard K. Wong, Davide Giovenzana, John VanLaanen, Teik Ee Yeo, Jie Yu | 2015-06-02 |
| 9025269 | Disk drive compensating for cycle slip of disk locked clock when reading mini-wedge | Richard K. Wong, Sanghoon Chu, Jack M. Chue, Carl E. Barlow, Wei Guo +1 more | 2015-05-05 |
| 9013824 | Data storage device comprising dual read sensors and dual servo channels to improve servo demodulation | Jie Yu | 2015-04-21 |
| 8995075 | Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary | Michael Chang, Jie Yu | 2015-03-31 |
| 8970979 | Disk drive determining frequency response of actuator near servo sample frequency | Qing Jia, Hui Li, Shuyu Cao, Jie Yu | 2015-03-03 |
| 8970982 | Disk drive compensating for non-linearity of a head based on a fly height of the head | Jianguo Zhou, Abhishek Dhanda, Eugene Chun-Tsing Wu, Teddy T. C. Chen, Sanghoon Chu +1 more | 2015-03-03 |
| 8970980 | Disk drive evaluating burst metric | Abhishek Dhanda, Wei Guo, Russ A. Quisenberry, Jie Yu | 2015-03-03 |
| 8941945 | Data storage device servoing heads based on virtual servo tracks | Michael Chang, Wei Guo, Yun-Gi Hong, Brian P. Rigney | 2015-01-27 |
| 8934186 | Data storage device estimating servo zone to reduce size of track address | Wei Guo, Michael Chang, Russ A. Quisenberry, Richard K. Wong | 2015-01-13 |
| 8922938 | Disk drive filtering disturbance signal and error signal for adaptive feed-forward compensation | Xu Chen, Jianguo Zhou, Wei Xi, Kuang-Yang Tu | 2014-12-30 |
| 8917469 | Disk drive correcting an error in a detected gray code | Donald Brunnett, Jianguo Zhou, Wai Ee Wong | 2014-12-23 |
| 8824081 | Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement | Jie Yu | 2014-09-02 |
| 8792202 | Disk drive adjusting rotation speed of disk to compensate for blind area when measuring frequency response of servo control system | Jie Wan, Xiaotian Xu, Shuyu Cao, Jern Khang Tan, Wei Xi | 2014-07-29 |
| 8780477 | Disk drive adjusting servo timing to compensate for transient when crossing a servo zone boundary | Wei Guo, Michael Chang, Jie Yu | 2014-07-15 |