Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5498648 | Paper size mixtures | Arnold De Clercq, Roland Ettl, Carlos Goncalves, Andreas Hohmann, Ulrich Riebeling | 1996-03-12 |
| 4908240 | Printability of paper | Werner Auhorn, Hans-Juergen Degen, Ulrich Riebeling | 1990-03-13 |
| 4855343 | Paper size based on finely divided aqueous dispersions | Hans-Juergen Degen, Fritz Reichel, Ulrich Riebeling | 1989-08-08 |
| 4835212 | Sizing agents for paper based on finely divided aqueous dispersions | Hans-Juergen Degen, Fritz Reichel, Ulrich Riebeling | 1989-05-30 |