Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5729569 | Submerged arc furnace with vertically movable frame | Franz Schulze-Hagen, Hermann Cepin | 1998-03-17 |
| 5056104 | Apparatus for adjusting the position of an electrode in a metal smelting furnace | — | 1991-10-08 |
| 4615036 | Cooling the electrode connection in an arc furnace | Klaus von Ploetz, Ludger Zangs, Friedrich Nordmeyer | 1986-09-30 |