Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7771489 | Formulation for use in chrome or chrome-free tannage | Stephan Hueffer, Stefan Schroeder, Einhard Wagner, Karl Vill | 2010-08-10 |
| 7753964 | Method for producing a leather semi-finished product | Stephan Hueffer, Stefan Schroeder, Juergen Carle, Volker Bach, Tilman Taeger | 2010-07-13 |