Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7992526 | Condensing water heater | Ryan Ritsema | 2011-08-09 |
| 7971560 | Condensation draining system for condensing water heaters | Ryan Ritsema | 2011-07-05 |
| 7900589 | High efficiency water heater | Ross Campbell | 2011-03-08 |
| 7866168 | Heat pump water heater | Eugene L. West | 2011-01-11 |