Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349441 | Fluid treatment method and apparatus | Andreas Grohmann, Ulrich Hasselbarth, Helmuth Marks | 1982-09-14 |
| 4297221 | Process and apparatus for the treatment of untreated water | Ulrich Hasselbarth, Andreas Grohmann, Helmut Marks | 1981-10-27 |