Du Dai — 2 Patents at Otis Elevator

Du Dai has been granted 2 US patents while listed as an inventor at Otis Elevator. The first was granted in 2017 and the most recent in June 2018. Du Dai ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Du Dai in Shanghai, CN.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
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

Du Dai — 2 Patents

Issued Patents All Time

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