Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840873 | Production of optical recording medium | Hideki Kobayashi, Minoru Ikeda, Koichi Saito, Shiro Nagata | 1989-06-20 |
| 4816841 | Optical recording medium | Hideki Kobayashi, Minoru Ikeda, Koichi Saito, Shiro Nagata | 1989-03-28 |