Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4491952 | Electric furnace dome | Matti E. Honkaniemi, Martti Jankkila, Matias Virta, Veikko Iisakka, Helge Krogerus +3 more | 1985-01-01 |
| 4424959 | Brickwork construction | Frans H. Tuovinen, Pentti O. Hokkanen, Lauri A. Mustikka, Matti Virta | 1984-01-10 |