Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845008 | Light-sensitive positive working, o-guinone diazide presensitized plate with mixed solvent | Akira Nishioka, Toshimi Hirano | 1989-07-04 |
KA
Keiji Akiyama
Overall (1989): #89,257 of 140,708Top 65%
1
Patents 1989