Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7646885 | Method for monitoring prepaid postage indicia on mail | Carsten Vullriede, Jörg Diefenbach | 2010-01-12 |
| 7529386 | Method and device for monitoring stamps on mail | Carsten Vullriede, Jörg Diefenbach | 2009-05-05 |