Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4748090 | Magnetic recording media | Nobuyuki Yamamoto, Katsumi Ryoke, Nobuo Tsuji, Yuzo Higaki | 1988-05-31 |
| 4554220 | Magnetic recording media | Nobuyuki Yamamoto, Katsumi Ryoke, Nobuo Tsuji, Yuzo Higaki | 1985-11-19 |
| 4548873 | Magnetic recording media with oxyfatty acid lubricant | Nobuyuki Yamamoto, Yoshito Mukaida, Nobuo Tsuji, Yuzo Higaki | 1985-10-22 |