Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4746431 | Device for the collection of water in a granular material bed filter | Jean Durot, Robert Louboutin | 1988-05-24 |
| 4604197 | Submerged filter filled with granular material | Robert Louboutin | 1986-08-05 |