Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6335945 | Electric ARC low-shaft smelting furnace with a central tube with telescopic electrodes and a sliding upper receptacle lid | Andreas Schüring, Hans Schaller | 2002-01-01 |
| 5961688 | Process and device for making liquid iron by non-electric and electric smelting | Udo Falkenreck, Stefan Lemke, Udo Evers | 1999-10-05 |
| 5492309 | Closed tiltable steelworks arc furnace with associated scrap charging assembly | Hans Schaller | 1996-02-20 |
| 4978105 | Steel mill system which includes a metallurgical furnace and a further processing system | — | 1990-12-18 |
| 4909303 | Steel manufacturing system, particularly a mini-steel plant | — | 1990-03-20 |
| 4736383 | Method for melting scrap or other materials and apparatus for implementing the method | — | 1988-04-05 |