Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859500 | Method for preparing a magnetic recording medium | Takeshi Kakuta | 1989-08-22 |
| 4822672 | Abasive tape | Nobutaka Yamaguchi, Eiichi Tadokoro | 1989-04-18 |
| 4812369 | Magnetic recording medium | Kazuko Hanai, Yasuyuki Yamada | 1989-03-14 |