Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D342307 | Valve | Thomas Bartholf, Bengt Sodergard | 1993-12-14 |
| 5161958 | Valve device for automatic circulation in a waste water pump station | — | 1992-11-10 |
| 4948342 | Method and device for automatic circulation in a waste water pump station | — | 1990-08-14 |