Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4950394 | Arrangement for driving out volatile impurities from ground water | Bruno Bernhardt, Anton Hessner | 1990-08-21 |
| 4886119 | Method of and arrangement for driving volatile impurities from ground | Bruno Bernhardt, Anton Hessner | 1989-12-12 |