Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10641020 | Electromagnetic release door closer | Haojie Li, Guowei Jiang, Qiaojie Liao | 2020-05-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10641020 | Electromagnetic release door closer | Haojie Li, Guowei Jiang, Qiaojie Liao | 2020-05-05 |