Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6207054 | Method of biologically cleaning polluted water | — | 2001-03-27 |
| 5908554 | Method and plant for the purification of waste water by the activated sludge method | Marinus Nielsen | 1999-06-01 |