Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6424672 | Device for producing slag in an electric arc furnace | Karl Stein | 2002-07-23 |
| 6400748 | Method for operating an electric arc furnace to build up and maintain foamed slag | Karl Stein | 2002-06-04 |
| 6379415 | Method for feeding granular solids into metal melts | Lutz Garten, Klaus Keller, Karl Stein | 2002-04-30 |