Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4713108 | NPK complex fertilizer | Torstein Obrestad, Hans Groland | 1987-12-15 |
| 4486396 | Stabilized ammonium nitrate or stabilized products having a high content of ammonium nitrate, and method of producing such products | Ellen Brekke, Arne O. Egner | 1984-12-04 |
| RE31682 | Process for manufacturing concrete of high corrosion resistance | Paul Olstad | 1984-09-25 |
| 4204053 | Method for the production of urea of high mechanical strength | Tore Elstrom, deceased, Per F. Gustavsen | 1980-05-20 |