Issued Patents All Time
Showing 1–25 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8228628 | Data storage disk having variable location signal and disk drive using the data storage disk | Kum-Jung Song | 2012-07-24 |
| 8040630 | Method and apparatus for estimating touchdown of a slider in a hard disk drive | Dongman Kim | 2011-10-18 |
| 7952825 | Method and apparatus adjusting reference clock frequency and disk drive using same | Cheol-hoon Park | 2011-05-31 |
| 7813076 | Method for estimating position error gain for hard disk drives | Chang-Ik Kang | 2010-10-12 |
| 7777982 | Disturbance compensation determination apparatus, a related method, a computer-readable medium storing a computer program related to the method, and a disk drive comprising the apparatus | Nam-guk Kim, Sung Won Park | 2010-08-17 |
| 7715140 | Method of determining size of error and write control method for hard disc drive, hard disc drive using the write control method, and media storing computer programs for executing the methods | Cheol-hoon Park | 2010-05-11 |
| 7667417 | Apparatus and method compensating recurring false speed errors in DC motor and disk drive adopting same | Kyoung-whan Oh | 2010-02-23 |
| 7605994 | Multiple sinusoidal seek servo system for reducing seek acoustics and seek time in hard disk drives | Chang-Ik Kang, Young-Hoon Kim | 2009-10-20 |
| 7593180 | HDD data read control apparatus, medium, and method | Jong-Yun Yun | 2009-09-22 |
| 7564644 | Adaptive disturbance repressing method and apparatus, and disk drive apparatus using the same | Nam-guk Kim, Sung Won Park | 2009-07-21 |
| 7489467 | Method for measuring track width of hard disk drive | Jae Hyeong Kim, Yong-Gwon Lee, Cheol-hoon Park | 2009-02-10 |
| 7432673 | Method, medium, and apparatus controlling current gain change of a spindle motor driver | Kyoung-whan Oh, Cheol-hoon Park | 2008-10-07 |
| 7420764 | Servo controller method and apparatus for high tracks per inch hard disk drives using a delay accomodating state estimator | Young-Hoon Kim, Seong-Woo Kang, Dong-Ho Oh, Yun-Sik Han, Tae-Yeon Hwang | 2008-09-02 |
| 7385780 | Online identification of secondary actuator transfer function via system decoupling in multiple-stage actuator servo systems in disk drives | Young-Hoon Kim, Dong-Jun Lee, Hyung Jai Lee | 2008-06-10 |
| 7369352 | Apparatus, medium, and method with seek servo control considering temperature change | Nam-guk Kim, Cheol-hoon Park | 2008-05-06 |
| 7342739 | Method, medium, and apparatus compensating for torque variations based on temperature | Cheol-hoon Park, Nam-guk Kim | 2008-03-11 |
| 7336438 | Write control method of hard disk drive, hard disk drive adapting the method and recording medium thereof | Cheol-hoon Park | 2008-02-26 |
| 7333288 | Method and apparatus for single written-in Repeatable Run-Out correction function used in multi-stage actuation control of hard disk drive | Young-Hoon Kim, Dong-Jun Lee, Hyung Jai Lee | 2008-02-19 |
| 7333292 | Seek servo control method for adapting to supply voltage variation and disk drive using the same | Nam-guk Kim, Cheol-hoon Park | 2008-02-19 |
| 7248428 | Method, medium, and apparatus controlling track seek in a recording and/or reproducing apparatus | Nam-guk Kim, Cheol-hoon Park | 2007-07-24 |
| 7203024 | Method of testing servo burst signals of hard disk drive and recording medium adapted therefor | Yong-Gwon Lee, Chul-Sung Park, Cheol-hoon Park | 2007-04-10 |
| 7158335 | Method for resonance identification in hard disk drives | Cheol-hoon Park, Yong-Gwon Lee | 2007-01-02 |
| 7158337 | Method and apparatus for providing positional information on a disk | Tung Nguyen, Jun-seok Shim, Kang Seok Lee, Soo Il Choi, Seong-hwan Yu | 2007-01-02 |
| 7145743 | Apparatus and method for unlatching a head within a data storage device | Cheol-hoon Park, Kwang-jo Jung, Yong-Gwon Lee, Chul-Sung Park | 2006-12-05 |
| 7116515 | Method and apparatus for compensating for torque change in seek servo | Yong-Gwon Lee, Cheol-hoon Park | 2006-10-03 |