Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4290800 | Process for feeding iron sponge into an electric arc furnace | Siegfried Sensis, Joachim Schwerdtfeger, Klaus Walden | 1981-09-22 |
| 4259539 | Melting furnace | Emil Elsner, Rolf Assenmacher, Gerhard Fuchs | 1981-03-31 |