QC

Qing Cheng

OE Otis Elevator: 1 patents #88 of 253Top 35%
Overall (2021): #298,029 of 548,734Top 55%
1
Patents 2021

Issued Patents 2021

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11192756 Safety control device for handrail, conveyor system and safety control method for handrail Hai Cui, Yi Fang, Xingsong Xu, Xinxiang Jiang, Jiaying CHEN +3 more 2021-12-07