Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10244840 | Jewelry storage device and display method thereof | Xiu Ling Zhu | 2019-04-02 |
| 10203288 | Multi-functional precious stone testing apparatus and method thereof | Xiuling Zhu | 2019-02-12 |
| 10203317 | Multi-functional precious stone testing apparatus and method thereof | Xiuling Zhu | 2019-02-12 |