Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4444959 | Water-soluble benzylated polyamidoamines | Guenter Frey, Werner Streit, Rolf Fikentscher, Hans-Juergen Degen | 1984-04-24 |
| 4425238 | Removal of anionic compounds from water | Hans-Juergen Degen, Friedrich Linhart, Werner Auhorn, Guenter Frey, Werner Streit +1 more | 1984-01-10 |
| 4383834 | Coloring of paper | Hans-Juergen Degen, Guenter Frey, Werner Streit, Rolf Fikentscher, Klaus Wulz | 1983-05-17 |