Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4788092 | Disc-shaped magnetic recording medium | Yoshihisa Kawamura, Nobuyuki Nihei | 1988-11-29 |
| 4654260 | Magnetic recording medium | Yoshihisa Kawamura, Masashi Somezawa | 1987-03-31 |
| 4613545 | Magnetic recording medium | Nobuyuki Nihei | 1986-09-23 |