Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846852 | Method and apparatus for separating and recovering volatile solvents from exhaust air | Stefan Schweitzer, Ernst Golde | 1989-07-11 |
| 4790517 | Apparatus for the direct reduction of sulphurous iron ores | — | 1988-12-13 |
| 4735653 | Process for the direct reduction of sulphurous iron ores | — | 1988-04-05 |