Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7169222 | Multilayer interference pigments | Hans-Dieter Bruckner, Andrea Heyland, Christoph Schmidt, Christina Schank | 2007-01-30 |
| 6689205 | Multilayer interference pigments | Hans-Dieter Bruckner, Andrea Heyland, Christoph Schmidt, Christina Schank | 2004-02-10 |
| 6019831 | Non-lustrous pigments | Christoph Schmidt, Margarete Herbski, Ralf Emmert, Klaus Ambrosius | 2000-02-01 |