Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6382677 | Security element and method for producing same | Wittich Kaule, Jurgen Schutzmann, Friedrich Kretschmar | 2002-05-07 |
| 6376017 | Method and device for producing a foil material | Wittich Kaule | 2002-04-23 |