Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6251223 | Process for improving printing paper | Hansjorg Kessler, Wolfram Friesen | 2001-06-26 |
| 5952091 | Web printing paper coated on both sides and process for its manufacture | Adam Gurtler, Bernd Pelech, Paul H. Dahling | 1999-09-14 |
| 5753077 | Web printing paper and process for producing it | Adam Gurtler, Paul H. Dahling, Bernd Pelech | 1998-05-19 |
| 4580438 | Method and apparatus for testing the duplicating characteristics of pressure-sensitive duplicating sheets | — | 1986-04-08 |