Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5628903 | Apparatus for the removal of clarified waste water from circular tanks | — | 1997-05-13 |
| 5591348 | Device for the central feeding of tanks such as circular grit traps, grit classifiers or settling tanks of circular construction | Anton Felder | 1997-01-07 |