Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5409686 | Process for producing yellow copper (I) oxide with narrow particle size range | Gerd Mrusek, Hermann Winkler, Michael Stelter | 1995-04-25 |
| 4245821 | Refining furnace for nonferrous metal | Gerhard Kappell | 1981-01-20 |