Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5690529 | Adsorber material, apparatus and process for concentrating and recovering trace materials from the gaseous phase | Helmut Oberpriller, Reinhold Hilpert, Josef Ritter, Harald Ertl, Rolf Lerch +3 more | 1997-11-25 |