Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11467101 | System for ascertaining optical characteristics of gemstone | Koon Chung HUI | 2022-10-11 |
| 11326952 | Process and system for colour grading for diamonds | Koon Chung HUI, Wing Chi TANG | 2022-05-10 |