Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4771197 | Frequency converter-controlled squirrel cage motor | Matti Kankipuro | 1988-09-13 |
| 4742893 | Signalling procedure for a lift and a signalling system | Matti Otala, Matti Kahkipuro, Urpo Sten | 1988-05-10 |