Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4343831 | Process for producing magnetic recording medium | Nobuo Tsuji, Masaaki Fujiyama, Yasuyuki Yamada | 1982-08-10 |
| 4310599 | Magnetic recording element | Masaaki Fujiyama | 1982-01-12 |