Issued Patents All Time
Showing 1–4 of 4 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, Jürgen George, Ralf Hoven +3 more | 2011-10-18 |
| 7166197 | Coke oven door with wraparound gas channel and membrane | Hans-Josef Giertz, Klaus Dieter Ruthemann, Jürgen George, Franz Liesewitz, Horst Schroder | 2007-01-23 |
| 7067043 | Coke oven door with gas channel | Hans-Josef Giertz, Franz Liesewitz, Frank Rossa | 2006-06-27 |
| 6918999 | Device and method for sealing levelling door aperture of a coke oven chamber | Hans-Josef Giertz, Friedrich Huhn, Franz Liesewitz | 2005-07-19 |