Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868139 | Aqueous cholesterol standard solution and process for its preparation | Gisela Dengler, Joachim Ziegenhorn | 1989-09-19 |
| 4816393 | Nucleoside triphosphate-dependent 1-methylhydantoinase, a process for obtaining it and the use thereof | Joachim Siedel, Albert Roder, Joachim Ziegenhorn, Hans Mollering, Helmgard Gauhl | 1989-03-28 |