Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5597492 | Device for discharge limitation and simultaneous temporary storage of waste water and also separation of settleable and floating matter from foul water and such a method | — | 1997-01-28 |
| 5591348 | Device for the central feeding of tanks such as circular grit traps, grit classifiers or settling tanks of circular construction | Franz Valentin | 1997-01-07 |