Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851321 | Superhigh contrast negative-type silver halide photographic material | Hisashi Okada, Morio Yagihara, Kazunobu Katoh | 1989-07-25 |
YT
Yoshihiro Takagi
Overall (1989): #40,207 of 140,708Top 30%
1
Patents 1989