Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5300663 | Photochromic naphthacenequinones, process for their preparation and the use thereof | Walter Fischer, Evelyn Fischer, Ernst Minder, Manfred Hofmann, Jurgen Finter | 1994-04-05 |