Issued Patents 2025
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12350951 | Optical anti-counterfeiting element and anti-counterfeiting product | Baoli Zhang, Kai Sun, Weiwei Zhang | 2025-07-08 |
| 12304231 | Optical anti-counterfeiting element and manufacturing method therefor | Chunhua Hu, Weiwei Zhang, Kai Sun | 2025-05-20 |
| 12257857 | Optical anti-counterfeiting element and manufacturing method thereof | Weiwei Zhang, Kai Sun | 2025-03-25 |
| 12233658 | Multi-plating-layer optical anti-counterfeiting element and manufacturing method thereof | Chunhua Hu, Weiwei Zhang, Baoli Zhang | 2025-02-25 |
| 12189118 | Method for designing nonsymmetric freeform surface optical system | Yi-Lin Tan, Guo-Fan Jin, Shou-Shan Fan | 2025-01-07 |