Issued Patents All Time
Showing 1–2 of 2 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, Peter Holbach | 1983-01-11 |
| 4287861 | Reciprocating internal-combustion engine | Eugen Egger, Rudolf Unger | 1981-09-08 |