Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6307604 | Light source having a luminescent layer | Rifat A. M. Hikmet, Thomas Welker | 2001-10-23 |
| 5884560 | Printing form for a rotary relief-printing method | Joachim Opitz, Jurgen Reck, Christoph Hars, Joachim Sonnenschein | 1999-03-23 |