Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5310909 | Photochromic compounds, a process for their preparation, and their use | Walter Fischer, Jurgen Finter, Kurt Meier, Martin Roth | 1994-05-10 |
| 5300663 | Photochromic naphthacenequinones, process for their preparation and the use thereof | Walter Fischer, Ernst Minder, Manfred Hofmann, Jurgen Finter, Heinz Spahni | 1994-04-05 |