Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12391900 | Method for removing silver mirroring from surface of black-and-white negative film | Yuhu Li, Zhihui Jia, Ersudai Ma, Yajun Zhou | 2025-08-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12391900 | Method for removing silver mirroring from surface of black-and-white negative film | Yuhu Li, Zhihui Jia, Ersudai Ma, Yajun Zhou | 2025-08-19 |