Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8047821 | Ring rack oil pumping machine | Xinyi Gu, Yonghai LIU, Zhisheng Tian, Zhengyou Feng | 2011-11-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8047821 | Ring rack oil pumping machine | Xinyi Gu, Yonghai LIU, Zhisheng Tian, Zhengyou Feng | 2011-11-01 |