Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873154 | Magnetic recording medium containing Fe, Co, N and O | Tadashi Yasunaga | 1989-10-10 |
| 4801500 | Magnetic recording medium | Tadashi Yasunaga | 1989-01-31 |
AY
Akio Yanai
Overall (1989): #31,574 of 140,708Top 25%
2
Patents 1989