Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875610 | Method of and system for driving magnetic tape | Katsuya Yokoyama, Takuji Sekiguchi | 1989-10-24 |
| 4876022 | Method for preparing ferromagnetic iron oxide particles | Nobuo Yamazaki | 1989-10-24 |