Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6648942 | Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus | Robert M. Klawonn | 2003-11-18 |
| 6582491 | Method for producing molten iron in duplex furnaces | Ronald D. Gray | 2003-06-24 |