Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4332587 | Colorant preparations, a process for their production and their use for coloring plastics | Michael Kressner, Joachim Kolbe, Fritz Bremer, Karlheinz Wolf, Ferdinand Kummeler | 1982-06-01 |