Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6222801 | Optical pickup using optically variable iris | Jang-hoon Yoo, Pyong-yong Seong, Yong Jae Lee, Tae Kyung Kim | 2001-04-24 |
| 6167004 | Error signal detecting apparatus of optical pickup adopting hologram grating | Yong Jae Lee, Tae Kyung Kim, Pyong-yong Seong, Jang-hoon Yoo, Byung-ryul Ryoo +1 more | 2000-12-26 |