Changke Yang — 1 Patent in 2021

OEOtis Elevator: 1 patents #88 of 253Top 35%

Hangzhou City, CN: #277 of 961 inventorsTop 30%

Overall (2021): #492,969 of 548,734Top 90%

1 Patents 2021

Issued Patents 2021

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
11203511	Traction system for elevator and elevator system	WeiHua Yuan, LiuDi Gong	2021-12-21