Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8022170 | Copolyamides | Heinz Hoff, Hanns-Jorg Liedloff, Ralph Kettl | 2011-09-20 |
| 7993755 | Photochromic molding compositions and articles produced therefrom | Ralf Hala, Nikolai Lamberts | 2011-08-09 |