Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4699909 | Benzotriazolyl-4,5-dihydro-3(2H)-pyridazinones | Norbert Hauel, Volkhard Austel, Joachim Heider, Manfred Reiffen, Willi Diederen | 1987-10-13 |
| 4616018 | Benzotriazolyl-4,5-dihydro-3(2H)-pyridazinones | Norbert Hauel, Volkhard Austel, Joachim Heider, Manfred Reiffen, Willi Diederen | 1986-10-07 |