Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4952683 | Process for the preparation of sphingosine derivatives | Wolfgang Fraefel, Richard Schmidt, Rudolf Klager, Peter Zimmermann | 1990-08-28 |
| 4544552 | Process for the preparation of cell and tissue regenerating substances | Wolfgang Fraefel | 1985-10-01 |