Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5009397 | Plant to be used for metallurgical treatments of metal compounds and/or metal alloys or for producing calcium carbide | Heinz Muller, Leopold Werner Kepplinger, Panajiotis Matzawrakos, Erwin Koch, Heinrich Auberger | 1991-04-23 |
| 4781755 | Method of recovering copper and furnace for carrying out the method | Erwin Koch, Heinz Muller | 1988-11-01 |
| 4620195 | Method of fabricating an ink droplet generator for an ink jet printer and ink droplet generator fabricated thereby | Otto Eblen, Franz Kohler, Norbert Meinusch | 1986-10-28 |