Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7488002 | Security and/or value document | Benedikt Ahlers, Frank Kappe, Roland Gutmann, Armim Franz-Burgholz | 2009-02-10 |
| 6234537 | Security document with optically excitable dyes for authenticity check | Roland Gutmann, Benedikt Ahlers, Frank Kappe, Arnim Franz-Burgholz | 2001-05-22 |
| 6216949 | Process for protecting products against forgery by means of machine-readable distinctive safety features | — | 2001-04-17 |