Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847156 | Magnetic recording medium | Yasuo Nishikawa, Kenichi Masuyama, Yutaka Kakuishi | 1989-07-11 |
| 4839225 | Magnetic recording medium | Shigeo Komine | 1989-06-13 |
| 4820581 | Magnetic recording medium | Shinji Saito, Hiroshi Ogawa, Yasuo Tamai | 1989-04-11 |
| 4801505 | Magnetic recording medium | Kiyomi Ejiri, Hiroaki Araki, Akira Kasuga | 1989-01-31 |