DD

Du Dai

OE Otis Elevator: 2 patents #650 of 1,840Top 40%
Overall (All Time): #1,956,623 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
9994428 Brake for use in passenger conveyor system Alois Senger, Jian Cheng 2018-06-12
9637351 Conveyor band drive system Jian Cheng, Yongbo Zhang, Fengshu Yue, Huisheng Zheng, Hongmin Zhu +1 more 2017-05-02