Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6602340 | Transparent medium with angular-selective transmitting or reflecting properties | Christina Schank, Gerhard Pfaff, Joachim Weitzel, Wolfgang Hechler | 2003-08-05 |
| 6306493 | Laser-markable paper and board products | — | 2001-10-23 |