Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8083822 | System for treating exhaust gas | Loran Hoffman, Richard A. Crandell, Ryan M. Duffek | 2011-12-27 |
| D645882 | Engine exhaust treatment device housing | Ryan M. Duffek, Richard A. Crandell | 2011-09-27 |
| D645477 | Engine exhaust treatment device housing | Ryan M. Duffek, Richard A. Crandell | 2011-09-20 |