Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5696243 | Diphenylamine compounds, polymers prepared therefrom and non-linear optics devices containing the same | Stefan Beckmann, Karl-Heinz Etzbach | 1997-12-09 |
| 5654122 | N-aminopyridone dyes | Karl-Heinz Etzbach, Ernst Schefczik, Matthias Wiesenfeldt | 1997-08-05 |
| 5612465 | Phenylazotriazolopyridine dyestuffs | Ernst Schefczik, Karl-Heinz Etzbach, Helmut Reichelt, Clemens Grund | 1997-03-18 |