Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4353534 | Apparatus for supplying gas to a revolving cylindrical furnace | Wilhelm Janssen | 1982-10-12 |
| 4203760 | Method for producing steel from sponge metal by using a gas plasma | Heinrich-Otto Rossner | 1980-05-20 |