Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D278595 | Fastener for exhaust air valves | — | 1985-04-30 |
| 4512356 | Exhaust air valve | — | 1985-04-23 |
| D278079 | Exhaust air valve | — | 1985-03-19 |
| 4482267 | Apparatus for mounting a ventilation element in a ventilation conduit | — | 1984-11-13 |
| D273702 | Adjustable ventilation nozzle | Sven H. Carlsson | 1984-05-01 |
| 4320695 | Air diffuser | Birger Eriksson | 1982-03-23 |