Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5182693 | Magnetic disk | Keiji Koga, Jun Satoh, Kenji Yokoyama, Yasumichi Tokuoka | 1993-01-26 |
| 5160761 | Method for making a magnetic disk | Keiji Koga, Jun Satoh, Kenji Yokoyama, Yasumichi Tokuoka | 1992-11-03 |
| 5140486 | Magnetic recording and reproduction | Kenji Yokoyama, Jun Satoh, Keiji Koga, Yasumichi Tokuoka | 1992-08-18 |