Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6920850 | Engine lubrication system | Liyun Zheng | 2005-07-26 |
| 6860250 | Engine lubrication system and pressure reducing valve for limiting overhead oil flow | Liyun Zheng | 2005-03-01 |