Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8038800 | Method and device for cleaning the door of a coke oven | Frank Rossa, Hans-Josef Giertz, Friedrich Huhn, Ralf Hoven, Detlef Mattern +3 more | 2011-10-18 |
| 7166197 | Coke oven door with wraparound gas channel and membrane | Hans-Josef Giertz, Klaus Dieter Ruthemann, Franz Liesewitz, Horst Schroder, Friedrich-Wilhelm Cyris | 2007-01-23 |
| 6929719 | Leveller bar for coking ovens | Hans-Josef Giertz, Klaus Dieter Ruthemann | 2005-08-16 |