Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830681 | Oxygen cutting method and nozzle | Eric Dufour, Roger Le Goff | 1989-05-16 |
| 4821963 | Steelworks cutting nozzle with a double heating ring | Patrick Fonteneau, Didier Lasnier | 1989-04-18 |