Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11648792 | Embedded variable curved spiral patterns | Rein-Lien Hsu, William O'Connor, Yecheng Wu, Robert L. Jones | 2023-05-16 |
| 11267276 | Optically variable ghost image with embedded data | Yecheng Wu, Robert L. Jones, Daoshen Bi | 2022-03-08 |
| 10747992 | Document authentication | Stephen Miu, Daniel Poder, Yecheng Wu | 2020-08-18 |
| 10675904 | Identification document with tactile feature | Daoshen Bi, Robert L. Jones | 2020-06-09 |
| 10095924 | Document authentication | Stephen Miu, Daniel Poder, Yecheng Wu | 2018-10-09 |
| 10040309 | Identification document with tactile feature | Daoshen Bi, Robert L. Jones | 2018-08-07 |