Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5235668 | Portable electric space heater with air cooled outer wall surfaces | — | 1993-08-10 |
| 5230468 | Combination of cassettes for insulation of radiators | Tauno K. Koponen | 1993-07-27 |