Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5306815 | Azo dyes with a coupling component of the quinoline series | Erwin Hahn, Clemens Grund, Helmut Reichelt, Andreas Guldner, Mathias Wiesenfeldt +3 more | 1994-04-26 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5306815 | Azo dyes with a coupling component of the quinoline series | Erwin Hahn, Clemens Grund, Helmut Reichelt, Andreas Guldner, Mathias Wiesenfeldt +3 more | 1994-04-26 |