Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4483709 | Steel production method | Eberhard G. Schempp, David Lee Schroeder | 1984-11-20 |
| 4449701 | Tuyere for the injection of gases into a metallurgical vessel | Ken Pitzer, James Cunningham | 1984-05-22 |
| 4302244 | Steel conversion method | Walter Sieckman, Eberhard G. Schempp | 1981-11-24 |