Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9561977 | Method and apparatus for decreasing the content of impurities in raw water | — | 2017-02-07 |
| 7438814 | Method and apparatus for the purification of ground water | — | 2008-10-21 |
| 5126049 | Process for removing nitrogen compounds from raw water | — | 1992-06-30 |
| 5028398 | Device for providing a continuous biological decomposition of minerals and concentrates thereof | Ulf Edvardsson | 1991-07-02 |
| 4755304 | Method of purifying ground water | Rudolf H. Martinell | 1988-07-05 |
| 4683064 | Process for decreasing the nitrate content in water | Rudolf H. Martinell | 1987-07-28 |
| RE31347 | Procedure for separating and recovering marsh gas | Veli E. Reijonen, Rudolf H. Martinell | 1983-08-16 |
| 4354937 | Process for precipitating heavy metals from wastewater | — | 1982-10-19 |
| 4211615 | Process and a measuring cell for the coulometric determination of the content of a component dissolved in water | Carl H. M. Lindstrom, Hakan Westerberg | 1980-07-08 |