Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D970322 | Shovel | Yong Chen, Hongxiang Li | 2022-11-22 |
| 10794505 | Spring seat for an internal valve | Li Li, Fei Ji, Shao Lijing | 2020-10-06 |
| 10767788 | Valve body having primary and secondary stem guides | FeiFei Ji, Li Li | 2020-09-08 |
| 10641404 | Spring seat for an internal valve | FeiFei Ji, Li Li | 2020-05-05 |
| 10563786 | Internal valve system with valve inlet positioned relative to container feed inlet | Li Li, FeiFei Ji | 2020-02-18 |
| 10480682 | Strainer assembly for internal valve | FeiFei Ji, Li Li | 2019-11-19 |
| 10295081 | Valve body having primary and secondary stem guides | FeiFei Ji, Li Li | 2019-05-21 |
| 4646474 | Drill grinder | — | 1987-03-03 |