Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6383618 | Printed document comprising a luminescent authenticity feature | Wittich Kaule, Gerhard Stenzel | 2002-05-07 |
| 6344261 | Printed document having a value and comprising a luminescent authenticity feature based on a host lattice | Wittich Kaule, Gerhard Stenzel | 2002-02-05 |