Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8005603 | Fuel control system and method for gas engines | Kristian W. Yates, David G. Fisher, George A. Mansfield, III | 2011-08-23 |
| 6978774 | Emission control valve for gas-fueled engines | David G. Fisher, Kristian W. Yates, William A. Hoie | 2005-12-27 |