Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D942030 | Blackhead remover | — | 2022-01-25 |
| D942031 | Blackhead remover | — | 2022-01-25 |
| D942029 | Blackhead remover | — | 2022-01-25 |
| D926332 | Blackhead remover | — | 2021-07-27 |
| D925752 | Blackhead remover | — | 2021-07-20 |
| 8816699 | Voltage source for calibrating a fast transient voltage measurement system and calibration method | Weidong Liu, Weijiang Chen, Gongchang Yue, Chengyu Wang, Zhibing Li | 2014-08-26 |
| 5759951 | Hydrogenation demetalization catalyst and preparation thereof | Yusheng Zhao, Jiahuan Wang, Zhiwu Wang, Xilai Liu, Jingchun Shao +2 more | 1998-06-02 |