Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5095559 | Heating apparatus | Leif Liljegren | 1992-03-17 |
| 4815526 | Central space heating apparatus | Leif Liljegren | 1989-03-28 |
| 4747447 | Heat exchanger | Leif Liljegren | 1988-05-31 |
| 4521674 | Electric fluid heater employing pressurized helium as a heat transfer medium | Leif Liljegren | 1985-06-04 |