Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886703 | Magnetic recording medium | Hideomi Watanabe, Tsutomu Okita, Katsumi Ryoke, Hideaki Kosha | 1989-12-12 |
KH
Kazuo Hasumi
Overall (1989): #90,891 of 140,708Top 65%
1
Patents 1989