Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6811677 | Electrolytic cell for the production of aluminum and a method for maintaining a crust on a sidewall and for recovering electricity | Jan A. Aune, Kai Johansen | 2004-11-02 |
| 4752218 | Ceramic composite material and a lining for metallurgical smelting furnaces wherein a ceramic composite material is used | Otto Kristian Sonju | 1988-06-21 |
| 4674728 | Sidewall for a metallurgical smelting furnace | Jan A. Aune | 1987-06-23 |