Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4689148 | Apparatus for desalination and purification of water by reverse osmosis and ultrafiltration | Soren Fries, Axel Wenzlaff | 1987-08-25 |
| 4556488 | Apparatus for filtering and separating liquid and gaseous media | Heinz Griesbach | 1985-12-03 |
| 4228014 | Apparatus for desalination and purification of water by reverse osmosis and ultrafiltration | Soren Fries, Axel Wenzlaff | 1980-10-14 |