Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6660727 | Photochromic heterocyclically anellated indenochromene compounds | Manfred Melzig, Udo Weigand | 2003-12-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6660727 | Photochromic heterocyclically anellated indenochromene compounds | Manfred Melzig, Udo Weigand | 2003-12-09 |