ZZ

Zixu Zhang

OE Otis Elevator: 1 patents #88 of 253Top 35%
Overall (2021): #187,726 of 548,734Top 35%
1
Patents 2021

Issued Patents 2021

Patent #TitleCo-InventorsDate
10975927 Brake device for elevator and an elevator system Guochen Gao, Ruguang Liu 2021-04-13