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LI RAN
CN
3 patents
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USD983012S
Apr 11, 2023
Smart door lock
LI RAN
15 citations
84
US9157536B2
Oct 13, 2015
Backflow prevention device and fan assembly
LI RAN
14 citations
83
US9022734B2
May 5, 2015
Case structure and fan frame fixing module
LI RAN
3 citations
52