Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8044318 | Interrupting chamber of a circuit-breaker having two compression volumes | Denis Dufournet, Dan Penache, Michel Perret | 2011-10-25 |
| 6849819 | High-voltage or medium-voltage switch device with combined vacuum and gas breaking | Michel Perret, Denis Dufournet | 2005-02-01 |