Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5723625 | Process for the production of specific isomer mixtures from oxindole alkaloids | Klaus Keplinger, Gerhard Laus | 1998-03-03 |
| 5302611 | Oxindole alkaloids having properties stimulating the immunologic system & preparation containing the same | Klaus Keplinger | 1994-04-12 |