Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8025767 | Wet strength enhancers for paper | Martin Wendker, Stefan Frenzel, Claus Boettcher | 2011-09-27 |
| 7922867 | Method for producing paper, paperboard and cardboard having high dry strength | Norbert Schall, Martin Ruebenacker | 2011-04-12 |