Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8262985 | Smelting or reduction furnace, in particular electric arc furnace with an open, semi-closed or closed configuration | Dieter Borgwardt | 2012-09-11 |
| 7850903 | Tapping channel for a metallurgical furnace | Horst-Dieter Borgwardt, Jürgen Kunze | 2010-12-14 |
| 4727959 | Assembly of large structures | — | 1988-03-01 |