Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8327810 | High efficiency water heater | George R. Arnold | 2012-12-11 |
| 7614366 | High efficiency water heater | George R. Arnold | 2009-11-10 |
| 5313914 | Potable hot water storage vessel and direct-fired heat exchanger | — | 1994-05-24 |
| 5207212 | Submersible high-efficiency combustion chamber for a water heater | — | 1993-05-04 |