Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6290849 | Method for biological purification of waste water by the activated sludge method and apparatus for carrying out the method | S.o slashed.ren Rykaer | 2001-09-18 |
| 5536407 | Nitrification and denitrification wastewater treatment process | — | 1996-07-16 |