Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680463 | Method and arrangement for generating and checking a security imprint | Wolfgang Thiel | 1997-10-21 |
| 5671146 | Method for improving the security of postage meter machines | Frank Reisinger, Claus Freytag, Ralf Kubatzki, Enno Bischoff, Andreas Wagner +3 more | 1997-09-23 |