Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4481011 | Coke oven charge mixtures with coal binder | Wilhelm Stewen | 1984-11-06 |
| 4421604 | Procedure to control quality of coal | Gerd Nashan, Wilhelm Stewen | 1983-12-20 |
| 4385962 | Method for the production of coke | Wilhelm Stewen | 1983-05-31 |