Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9593398 | Hardened cobalt based alloy jewelry and related methods | Zhou Yansheng | 2017-03-14 |
| 9289037 | Hardened cobalt based alloy jewelry and related methods | Zhou Yansheng | 2016-03-22 |