Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881286 | Effective diffuser/thickener screen backflushing | Johan C. F. C. Richter, Finn Jacobsen | 1989-11-21 |
| 4793161 | Effective diffuser/thickener screen backflushing | Johan C. F. C. Richter, Finn Jacobsen | 1988-12-27 |