Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6892946 | Device for verifying documents | Robert Massen, Thomas Franz, Thomas Leitner | 2005-05-17 |
| 6750465 | Device for evaluating diffractive authenticity features | Arnim Franz-Burgholz, Roland Gutmann, Harald Hoeppner, Thomas Loer, Detlef Martens +5 more | 2004-06-15 |