Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9556049 | Method for treating sewage sludge and wastewater treatment plant | Wolfgang Ewert, Michael Sievers | 2017-01-31 |
| 8641902 | Method for wastewater treatment and wastewater treatment system | Wolfgang Ewert, Michael Sievers | 2014-02-04 |