Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6760299 | Optical disc having pits of different depth formed therein, optical disc device for reproducing the same, and method of reproduction | Hitoshi Takeuchi, Masaru Nomura | 2004-07-06 |
| 6728183 | Optical disk device | Hitoshi Takeuchi | 2004-04-27 |