Assignee
LIU WENJIE
4 granted patents·7 citations·filing 2005–2022
Top patents by PatentIndex Score
4 records- 0163US7789855B2Barrel type plunger for use with a needle-retractable safety syringe and the syringe using the sameLIU WENJIE·Filed 2008·Granted Sep 7, 2010·4 cites·22 claims
- 0261US7331936B2Cylindrical pushrod for needle-retracting safety injector and the needle-retraction controllable safety injectorLIU WENJIE·Filed 2005·Granted Feb 19, 2008·3 cites·20 claims
- 0357US11680688B1Hand-held electric device with changeable headLIU WENJIE·Filed 2022·Granted Jun 20, 2023·0 cites·14 claims
- 0438US8313458B2Barrel type plunger for use with a needle-retractable safety syringe and the syringe using the sameLIU WENJIE·Filed 2010·Granted Nov 20, 2012·0 cites·11 claims
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