Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9957743 | Slow closing door hinge | Zheng Chen | 2018-05-01 |
| 5867866 | Door hinge with a built-in damper | Zheng Chen | 1999-02-09 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9957743 | Slow closing door hinge | Zheng Chen | 2018-05-01 |
| 5867866 | Door hinge with a built-in damper | Zheng Chen | 1999-02-09 |