Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6829212 | High density optical disk and a method of high density recording | Seiji Morita | 2004-12-07 |
| 6822938 | Optical disk having lands and grooves with a reduced track pitch | Hiroyuki Matsumoto, Seiji Morita, Masatoshi Hayashi | 2004-11-23 |