Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4391786 | Production of calcium carbide | Erhard Wolfrum, Willi Portz, Georg Strauss | 1983-07-05 |
| 4259158 | Apparatus for producing abrasion resistant coke from brown coal briquets | Heinrich Weber, Kurt Lorenz, Horst Dungs, Roman Kurtz | 1981-03-31 |
| 4231844 | Method and apparatus for producing abrasion resistant coke from brown coal briquets | Heinrich Weber, Kurt Lorenz, Horst Dungs, Roman Kurtz | 1980-11-04 |