Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5322561 | Conductive flaky pigments | Constanze Prengel | 1994-06-21 |
| 5302199 | Interference pigments | Constanze Prengel | 1994-04-12 |
| 5286291 | Pigments containing carbon black | Gerhard Pfaff | 1994-02-15 |