Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4560005 | Sliding-sleeve valve for an oil well | Paul M. Helderle, Yannick Le Nours | 1985-12-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4560005 | Sliding-sleeve valve for an oil well | Paul M. Helderle, Yannick Le Nours | 1985-12-24 |