Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855516 | Method of manufacturing 2-propyn-1-ol | Helmut Westernacher, Thomas Stieren | 1989-08-08 |
| 4847440 | Method of manufacturing propynol | Helmut Westernacher, Thomas Stieren | 1989-07-11 |