ZT

ZuAn Tang

OE Otis Elevator: 1 patents #966 of 1,840Top 55%
Overall (All Time): #2,832,305 of 4,157,543Top 70%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
10865074 Handrail automatically tensioning system and a method for adjusting tension level of handrail QingXi Cai, Jianguo Li, Xin Wei, Jie Hu, Lifei Cheng +1 more 2020-12-15