Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10813226 | Process for improving performance of sliding rheostat of 5G communication high-frequency signal board | Qingfeng Liu | 2020-10-20 |
| 10212824 | Gold-plating etching process for 5G communication high-frequency signal boards | Qingfeng Liu | 2019-02-19 |