Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8006439 | Closing device | Francis Berthon | 2011-08-30 |
| 7942289 | Device for closing an opening, particularly a street manhole | Jean-Paul Pietrzak | 2011-05-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8006439 | Closing device | Francis Berthon | 2011-08-30 |
| 7942289 | Device for closing an opening, particularly a street manhole | Jean-Paul Pietrzak | 2011-05-17 |