Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4321454 | Method of and welding torch for arc welding | Gerardus A. M. Willems | 1982-03-23 |
| 4234778 | Method of and welding torch for arc welding | Gerardus A. M. Willems | 1980-11-18 |