Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4627498 | Fuse design for fire limiters or other safety appliances in ventilation installations | Erkki Aalto, Harri Saukkonen | 1986-12-09 |
| 4625626 | Control/fire damper for ducts inventilation installations | Arvo Aalto, Erkki Aalto, Markku Penttila, Harri Saukkonen, Arvi Tolmunen | 1986-12-02 |
| 4190085 | Gas flow regulating and measuring apparatus | Arvi Tolmunen | 1980-02-26 |