WY

WeiHua Yuan

OE Otis Elevator: 2 patents #650 of 1,840Top 40%
Overall (All Time): #1,894,481 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
11203511 Traction system for elevator and elevator system Changke Yang, LiuDi Gong 2021-12-21
10246297 Rust removing device for elevator guide rail YuHang Ou, ChunYan Yu, Jing Nie 2019-04-02