Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6977982 | Differential phase detection device and tracking error signal detection apparatus using the same | Byung-in Ma, In-sik Park, Joong-eon Seo, Sung-ro Go, Chang-jin Yang | 2005-12-20 |