Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6264834 | Sewage treatment plant for thickening a solid-liquid suspension | Didier Perrin, Jean-Pierre Virecoulon | 2001-07-24 |
| 5207907 | Compact apparatus for treating sludge by draining and pressing | Luc Delons, Joseph Andrieu | 1993-05-04 |