Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844963 | Magnetic disk and method of manufacturing same | Masaaki Imamura | 1989-07-04 |
| 4721646 | Magnetic recording medium | Keigo Iechika, Fuzio Maeda, Masa-aki Imamura, Yoshiki Kato, Youichi Kawakubo | 1988-01-26 |