Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5019266 | Waste water purification process with batchwise supply of waste water to the activated sludge tank | Carl-Johannes Soeder, Erich Zanders, Thomas Raphael, Joost Groeneweg | 1991-05-28 |