Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4374585 | Apparatus for the direct reduction of iron ores | Gero Papst, Hans J. Topfer | 1983-02-22 |
| 4248623 | Process for the direct reduction of iron ores | Gero Papst, Hans J. Topfer | 1981-02-03 |