Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9133750 | Method and system for verifying the operation of an SCR catalyst | Stephen Paul Levijoki, Cheryl J. Stark, Yue Wang | 2015-09-15 |
| 8720189 | Apparatus and method for onboard performance monitoring of oxidation catalyst | Shouxian Ren | 2014-05-13 |
| 8286419 | Exhaust diagnostic systems and methods for resetting after operation with poor reductant quality | Stephen Paul Levijoki, Cheryl J. Stark, Paul Jasinkiewicz, Brett B. Thompson | 2012-10-16 |
| 8047046 | Systems and method for monitoring urea level | Cheryl J. Stark, James M. Dixon, Michael Christopher Luckham | 2011-11-01 |