Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5312296 | False-ceiling construction and method for the flow of air in connection with a false-ceiling construction | Erkki Aalto, Pekka Kyllonen | 1994-05-17 |
| 5220910 | Device and method for ventilation | Erkki Aalto, Pekka Kyllonen | 1993-06-22 |
| 5133689 | Focussed ventilation procedure of a work spot and a focussed ventilation means | Erkki Aalto, Jouko Eloranta | 1992-07-28 |
| 5074198 | Focussed ventilation procedure for a work spot and apparatus used in the procedure | Erkki Aalto, Jouko Eloranta, Tapio Alapuranen | 1991-12-24 |
| 5063834 | Focussed ventilation procedure and focussed ventilation means | Erkki Aalto, Jouko Eloranta | 1991-11-12 |
| 4903894 | Ventilation control procedure and ventilation control means | Mertsi Niemela, Erkki Aalto | 1990-02-27 |
| 4890544 | Air distribution system | Erkki Aalto, Jouko Eloranta | 1990-01-02 |