Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7729054 | Optical diffuser for producing a circular light field | Ralf Becker, Ruediger Kittelmann, Harry Wagener, Ulrich Zirfas | 2010-06-01 |
| 7443588 | Optical diffuser for producing a circular light field | Ralf Becker, Ruediger Kittelmann, Harry Wagener, Ulrich Zirfas | 2008-10-28 |