QC

QingXi Cai

OE Otis Elevator: 1 patents #73 of 232Top 35%
Overall (2018): #272,615 of 503,207Top 55%
1
Patents 2018

Issued Patents 2018

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10040669 Asynchronous door knife of elevator integrated car door lock Xiaobo ZHANG, XiaoXiao Dong, Minchao Chen, Senyuan Qiao 2018-08-07