Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7224655 | Apparatus method for detecting tilt at inner and outer circumference and determining tilt degree based on times when focus error signals are detected | — | 2007-05-29 |
| 7203148 | Method and apparatus for identifying the type of optical recording medium | Jong-ryull Kim, Pyong-yong Seong, No-Jun Kwak, Chul-ho Jeon, Ki-bong Yun | 2007-04-10 |
| 7200087 | Method of detecting a type of disc using a reference ratio and detected ratio | — | 2007-04-03 |
| 7086132 | Method for assembling a polishing head and apparatus for detecting air leakage in the polishing head while assembling the same | Jung-Hwan Sung, Yong-Seok Ro, Doeg-Jung Kim | 2006-08-08 |
| 7038986 | Method and apparatus for discriminating between different types of discs | — | 2006-05-02 |
| 6754942 | Method for assembling a polishing head and apparatus for detecting air leakage in the polishing head while assembling the same | Jung-Hwan Sung, Yong-Seok Ro, Doeg-Jung Kim | 2004-06-29 |
| 6695680 | Polishing pad conditioner for semiconductor polishing apparatus and method of monitoring the same | Jae Hoon Choi | 2004-02-24 |