Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5992410 | High-efficiency furnace for mobile homes | William F. Raleigh, Wayne R. Reedy, Raymond P. Hampton, Donita M. Meyer | 1999-11-30 |
| 4561421 | High efficiency furnace | Dennis J. Koestler | 1985-12-31 |
| 4537178 | High efficiency furnace | Dennis J. Koestler | 1985-08-27 |