Issued Patents 2019
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10189680 | Landing-door door lock device | Yongtao Yang, Huanfeng Liu, Chong Chen, Hua Zhang, QingXi Cai | 2019-01-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10189680 | Landing-door door lock device | Yongtao Yang, Huanfeng Liu, Chong Chen, Hua Zhang, QingXi Cai | 2019-01-29 |