Issued Patents 2002
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6479133 | Document having a value | Wittich Kaule | 2002-11-12 |
| 6454166 | Security document with a security component and method for the production thereof | Wittich Kaule | 2002-09-24 |
| 6383618 | Printed document comprising a luminescent authenticity feature | Wittich Kaule, Gerhard Schwenk | 2002-05-07 |
| 6344261 | Printed document having a value and comprising a luminescent authenticity feature based on a host lattice | Wittich Kaule, Gerhard Schwenk | 2002-02-05 |
| 6337752 | Data carrier having an optically variable element and methods for producing it | Christoph Heckenkamp, Wittich Kaule | 2002-01-08 |