DD

Du Dai

OE Otis Elevator: 1 patents #50 of 167Top 30%
Overall (2017): #435,371 of 506,227Top 90%
1
Patents 2017

Issued Patents 2017

Patent #TitleCo-InventorsDate
9637351 Conveyor band drive system Jian Cheng, Yongbo Zhang, Fengshu Yue, Huisheng Zheng, Hongmin Zhu +1 more 2017-05-02