Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5071657 | Device for transdermal administration of active medicinal agents | Horst Oloff, Johannes Tack, Ingfried Zimmermann | 1991-12-10 |
| 4822616 | Vaginal ring | Ingfried Zimmermann, Hans-Jurgen Reck | 1989-04-18 |