Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860725 | Power burner-fluid condensing mode furnace | William R. Tallman, Steven C. McDevitt | 1989-08-29 |
| 4718401 | Hot air furnace | — | 1988-01-12 |
| 4515145 | Gas-fired condensing mode furnace | William R. Tallman, Steven C. McDevitt | 1985-05-07 |
| 4482291 | Automatic air inlet damper | Shekhar Chakrawarti, Michael Christoph Haydn | 1984-11-13 |