Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5128151 | Stabilized menadione bisulfite formulations and their preparation | Hans Kiefer, Joachim Schneider, Hagen Jaedicke | 1992-07-07 |
| 4977190 | Preparation of riboflavin, produced by a microbial method, in the form of spray-dried granules or microgranules | Joachim Meyer, Johannes Grimmer, Gunter Eipper, Hans Kiefer, Christoph Martin | 1990-12-11 |