Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861368 | Method for producing iron | Karl Brotzmann, Jonathan P. Moodie | 1989-08-29 |
| 4798624 | Method for the melt reduction of iron ores | Karl Brotzmann, Hans-Georg Fassbinder | 1989-01-17 |