Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6679014 | Rooftop water heater | Dennis R. Hughes, Marc W. Akkala, Kevin Field | 2004-01-20 |
| 6591788 | Rooftop water heater | Dennis R. Hughes, Marc W. Akkala, Kevin Field | 2003-07-15 |