Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5476533 | Process for sintering iron oxide-containing materials on a sintering machine | Fred Stieler, Walter Gerlach, Jurgen Otto, Martin Hirsch, Fred Cappel +4 more | 1995-12-19 |
| 4419216 | Process of recovering oil from oil-containing materials | Horst Seidel, Hans-Jurgen Weiss | 1983-12-06 |
| 4388174 | Process of recovering oil from oil-containing minerals | Horst Seidel, Hans-Jurgen Weiss | 1983-06-14 |