Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6306316 | Photochromic plastic object | Claudia Mann, Manfred Melzig | 2001-10-23 |
| 6225466 | Photochromic spirofluorenopyran compounds | Claudia Mann, Manfred Melzig | 2001-05-01 |
| 6146554 | Photochromic naphtopyrane colorants, method for the production and use thereof, photochromic object | Manfred Melzig, Claudia Mann | 2000-11-14 |