Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861898 | Isoindoline metal complexes | Heinrich Kowarsch, Erwin Hahn | 1989-08-29 |
| 4814441 | Finely divided transparent metal-free X-phthalocyanine | Peter Hauser | 1989-03-21 |
VR
Volker Radtke
Overall (1989): #13,518 of 140,708Top 10%
2
Patents 1989