Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4203763 | Method of manufacturing a lead alloy steel and a steel made according to the method | M. K. Olof Johnsson, Karl-Erik berg | 1980-05-20 |
| 4200458 | Method for the alloying of a metal melt | Karl-Erik Oberg | 1980-04-29 |