Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4536642 | Device for treating gases at high temperatures | Franz Koppl | 1985-08-20 |
| 4311545 | Method for the deposition of pure semiconductor material | Erwin Bugl, Rudolf Griesshammer, Helmut Lorenz, Franz Koppl | 1982-01-19 |