Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804387 | Liquid black dye mixture | Hans-Juergen Degen, Sigberg Pfohl | 1989-02-14 |
RB
Rudolf Bermes
Overall (1989): #60,275 of 140,708Top 45%
1
Patents 1989