Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4368371 | Process for the submerged-arc welding of light metals such as aluminum and aluminum alloys | Ulrich Dilthey, Friedrich Eichhorn, Peter Hirsch, Kurt Lettner | 1983-01-11 |