Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9080766 | Enhanced emission control for outdoor wood-fired boilers | Tyler Mainord Grace | 2015-07-14 |
| 8622054 | Methods and systems for reducing combustion emissions | R. Craig Sparling, Ronald E. Allred | 2014-01-07 |
| 6237587 | Woodburning fireplace exhaust catalytic cleaner | Ralph Sparling, Lincoln Busselle | 2001-05-29 |