Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5910578 | Phenylazoanilines | Erhard Klahr, Helmut Reichelt, Sabine Gruettner-Merten | 1999-06-08 |
| 5703238 | Preparation of pyridine dyes | Ernst Schefczik, Sabine Gruttner-Merten, Rudiger Sens, Helmut Reichelt | 1997-12-30 |
| 5700757 | Triazolopyridine dyes and intermediates therefor | Rudiger Sens, Helmut Reichelt | 1997-12-23 |