Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4399545 | Method of lowering electrodes of an electric-arc furnace | Lothar Harmsen, Jurgen Zieschang | 1983-08-16 |
| 4351055 | Water cooled wall element formed of tubes for melting furnaces | Klaus Bick, Lothar Harmsen, Jurgen Zieschang | 1982-09-21 |
| 4275258 | Water-cooled box designed as wall element for a melting furnace | Lothar Harmsen, Klaus Bick, Wilhelm Lachenmayer, Jurgen Zieschang | 1981-06-23 |