Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6712911 | Flame-cutting of cold or hot slabs using one or more oxycutting torches | Valerie Donze, Pascal Donze, Thierry Rozot | 2004-03-30 |
| 6534739 | Oxygen cutting of slabs | Valerie Donze, Pascal Donze, Thierry Rozot | 2003-03-18 |
| 5071105 | Gas torch with visual observation device | Michel Donze | 1991-12-10 |