Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622812 | Optical material | Fumio Tatezono, Toshio Harada, Meguru Ohara | 1997-04-22 |
| 5605779 | Optical memory medium | Kazuo Van | 1997-02-25 |
| 5592461 | Methods of recording and reproducing information using an optical recording medium | Tsuyoshi Tsujioka | 1997-01-07 |