Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4407947 | Process for obtaining metal-free corrinoids | Volker Koppenhagen, Gerhard Schlingmann, Ludwig Bischoff, Rosemarie Penkert, Eicke Siefert | 1983-10-04 |
| 4311643 | Process for producing metal corrinoids | Volker Koppenhagen, Gerhard Schlingmann, Ortrud Ebelmann | 1982-01-19 |