Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8333870 | Security paper | Theo Burchard, Mario Keller, Rudolf Seidler | 2012-12-18 |
| 5976320 | Method for producing paper pulp from fibers of annual plants | Gerrit Lund | 1999-11-02 |
| 4240035 | Digital demodulator on a semiconductor base | — | 1980-12-16 |