Inventor
Li su-min
CN3 patents
Patents
3 patentsUS10760649B2Sep 1, 2020
Speed reducer
HONGFUJIN PREC ELECT ZHENGZHOU CO LTD2 citations68
US10104560B2Oct 16, 2018
Testing machine and system for mobile phone
HONGFUJIN PREC ELECT ZHENGZHOU CO LTD4 citations66
US10823628B2Nov 3, 2020
Torsion and force sensing device and electric screwdriver utilizing same
HONGFUJIN PREC ELECT ZHENGZHOU CO LTD0 citations34