Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4752210 | Power vent and control for furnace | — | 1988-06-21 |
| 4543892 | Condensate handling means for condensing furnace | Ronald S. Tomlinson | 1985-10-01 |
| 4542734 | High efficiency furnace with secondary heat exchanger | Ronald S. Tomlinson | 1985-09-24 |
| 4460329 | Power vent and control for furnace | — | 1984-07-17 |