Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4491952 | Electric furnace dome | Matti E. Honkaniemi, Martti Jankkila, Aimo Nurminen, Veikko Iisakka, Helge Krogerus +3 more | 1985-01-01 |
| 4222786 | Ferrochromium slag for uses requiring refractoriness and mechanical strength | Frans H. Tuovinen, Matti E. Honkaniemi, Helge Krogerus | 1980-09-16 |