Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683622 | Optical elements having color-selective and polarization-selective reflection containing LC pigments, and the production of these elements | Oliver Kratzschmar, Silvia Ehmann, Franz-Heinrich Kreuzer | 1997-11-04 |