Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863793 | Magnetic recording medium | Hiroshi Ogawa, Shinji Saito | 1989-09-05 |
| 4851289 | Magnetic recording medium | Hiroshi Ogawa, Shinji Saito, Nobuo Yamazaki, Hiroaki Araki | 1989-07-25 |
| 4844991 | Magnetic recording medium and process for the preparation of the same | Masaaki Fujiyama, Yutaka Kakuishi | 1989-07-04 |