Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4547505 | N-Phenyl-N-'-cycloalkylalkanoylpiperazine useful as analgetics and process for its production | Jurgen Engel, Vladimir Jakovlev, Klaus Thiemer | 1985-10-15 |
| 4435563 | Process for the recovery of pure hellebrin | Karl-Heinz Mangartz, Norbert Seifried, Jurgen Engel, Otto Isaac | 1984-03-06 |