Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6745724 | Water heater having flue damper with airflow apparatus | Dennis R. Hughes, Christopher P. Flanner | 2004-06-08 |
| 6679014 | Rooftop water heater | Dennis R. Hughes, Marc W. Akkala, Randy T. Meyer | 2004-01-20 |