Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |