Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873172 | Process for forming a superhigh contrast negative image | Shigeo Hirano, Tadao Shishido, Akio Miyake | 1989-10-10 |
SI
Shoji Ishiguro
Overall (1989): #57,776 of 140,708Top 45%
1
Patents 1989