Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6815032 | Optical disc | Tetsuya Kondo, Takeo Kojima | 2004-11-09 |
| 6693873 | Information recording medium having parallel grooves with alternating convex-concave sections | Tetsuya Kondo | 2004-02-17 |
| 6676791 | Multilayered optical information-recording media and process for manufacture thereof | Tetsuya Kondo | 2004-01-13 |