Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857512 | Immunostimulating polysaccharides, method for using such, and pharmaceutical preparations containing them | Meinhart H. Zenk, Holger Ott | 1989-08-15 |
| 4844901 | Oxindole alkaloids having properties stimulating the immunologic system | Klaus Keplinger, Barbara Kreutzkamp | 1989-07-04 |