Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5944514 | Process and device for introducing bulk material into a rotary hearth furnace | Ulrich Pohl, Hartmut Schmieden, Gerd Herre | 1999-08-31 |
| 5729569 | Submerged arc furnace with vertically movable frame | Luciano Ambrosi, Franz Schulze-Hagen | 1998-03-17 |
| 4702461 | Charging electro furnaces | Emil Herre, Gerd Herre, Guenter Zimmer | 1987-10-27 |
| 4587659 | Feed through structure for electrodes in electric furnaces | Karl-Heinz Ungar | 1986-05-06 |