Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849015 | Method for two-stage melt reduction of iron ore | Jonathan P. Moodie, Trenna R. Turner | 1989-07-18 |
| 4798624 | Method for the melt reduction of iron ores | Karl Brotzmann, Richard E. Turner, deceased | 1989-01-17 |