Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7166197 | Coke oven door with wraparound gas channel and membrane | Hans-Josef Giertz, Jürgen George, Franz Liesewitz, Horst Schroder, Friedrich-Wilhelm Cyris | 2007-01-23 |
| 6929719 | Leveller bar for coking ovens | Hans-Josef Giertz, Jürgen George | 2005-08-16 |