Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833064 | Process for the formation of a high contrast negative image | Eiichi Okutsu, Morio Yagihara, Mitsunori Hirano | 1989-05-23 |
KH
Katsumi Hayashi
Overall (1989): #90,875 of 140,708Top 65%
1
Patents 1989