Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826137 | Apparatus and method for authentication/copy protection of optical storage medium and the optical storage medium | Jae Sun Lee, Yong-Hoo Sheen | 2004-11-30 |
| 6714497 | Method for forming an information recording medium having information on spare area, and method and apparatus for recording/reproducing data to/from the medium | Yeo Han Yun | 2004-03-30 |
| 6690634 | Method for forming an information recording medium having information on spare area, and method and apparatus for recording/reproducing data to/from the medium | Yeo Han Yun | 2004-02-10 |