Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5637218 | Flow control for evening out waste water inflow in soil-based installations for waste water purification | — | 1997-06-10 |
| 5273653 | Method of, and installation for, purifying liquids in horizontally flown-through plant containing filter beds | — | 1993-12-28 |
| 4904386 | Method of purifying liquids like wastewater by means of a filter bed containing aquatic plants planted in such filter bed | — | 1990-02-27 |
| 4855040 | Installation for purifying liquids using a through-flow-controlled aquatic plant-containing filter bed | — | 1989-08-08 |
| 4793929 | Method for the purification of sewage waters | Norbert Konemann | 1988-12-27 |
| 4331538 | Method for building up defined phosphate deposits from waste phosphates | — | 1982-05-25 |