Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5071534 | Aluminum electrolysis cell with continuous anode | Hans Kristian Holmen, Tormod Naterstad, Sigmund Gjorven | 1991-12-10 |
| 4659442 | Method of reducing the loss of carbon from anodes when producing aluminum by electrolytic smelting, and an inert anode top for performing the method | Tormod Naterstad, Knut Bergli | 1987-04-21 |