Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6113107 | Self-lubricated and-adjusted piston ring | Baodong Wang, Ping Cai, Yumin Zhang, Xiaoshan Cai | 2000-09-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6113107 | Self-lubricated and-adjusted piston ring | Baodong Wang, Ping Cai, Yumin Zhang, Xiaoshan Cai | 2000-09-05 |