Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5609731 | Process for gas pressure regulation in the retort of a coke oven | Hans-Josef Giertz, Friedrich Huhn, Hans J. Hammermann | 1997-03-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5609731 | Process for gas pressure regulation in the retort of a coke oven | Hans-Josef Giertz, Friedrich Huhn, Hans J. Hammermann | 1997-03-11 |