Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645614 | Process for the utilization of sewage sludges | Hans-Ulrich Dummersdorf, Gunther Herbst, Franz-Josef Menge, Helmut Kreusing | 1997-07-08 |
| 5626664 | Waste treatment process | Dirk Osing, G unter Ritter, G unter Treutlein | 1997-05-06 |
| 5607505 | Waste treatment process | Dirk Osing, G unter Ritter, G unter Treutlein | 1997-03-04 |