Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846969 | Activated sludge device having movable perforated plates and a nozzle for the destruction of foam | Rolf Ordelheide | 1989-07-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846969 | Activated sludge device having movable perforated plates and a nozzle for the destruction of foam | Rolf Ordelheide | 1989-07-11 |