Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5997616 | Moisture absorption device for electrical apparatus containing dielectric gas | Roger Ledru | 1999-12-07 |
| 5898150 | Gas-blast high-voltage circuit-breaker | Bernard Gallix, Roger Ledru | 1999-04-27 |