XD

XiaoXiao Dong

OE Otis Elevator: 2 patents #650 of 1,840Top 40%
Overall (All Time): #1,960,757 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
10427914 Elevator synchronous door knife Xiaobo ZHANG, QingXi Cai, Chong Chen 2019-10-01
10040669 Asynchronous door knife of elevator integrated car door lock Xiaobo ZHANG, QingXi Cai, Minchao Chen, Senyuan Qiao 2018-08-07