Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5829464 | Regulation device and method for regulation of an air flow | Raimo Parkkila, Jouni Laurikainen, Andrei Livtchak | 1998-11-03 |
| 4625626 | Control/fire damper for ducts inventilation installations | Erkki Aalto, Juhani Hasa, Markku Penttila, Harri Saukkonen, Arvi Tolmunen | 1986-12-02 |