Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622812 | Optical material | Toshio Harada, Masahiro Irie, Meguru Ohara | 1997-04-22 |
| 5604002 | Optical recording medium and reproducing method therefor | Tsuyoshi Tsujioka, Toshio Harada, Kazuhiko Kuroki | 1997-02-18 |