Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9661962 | Quick assembly and disassembly device of a toilet cover and implementation method thereof | Feiyu Li, Huiqing Wang, Yuzhi Liu | 2017-05-30 |
| 9556601 | Base connection device used to change a flapper drain valve to a barrel drain valve | Yuzhi Liu, Jianfu Wu | 2017-01-31 |
| 9487938 | Automatic protection device for a toilet inlet valve or drain valve | Xiping Li, Yuzhi Liu, Dongsheng Yao, Wenqing XIE, Jianfu Wu | 2016-11-08 |
| D638917 | Universal flapper | Yibin Chen, Yuzhi Liu | 2011-05-31 |
| 7089114 | Vehicle collision avoidance system and method | — | 2006-08-08 |