WeiHua Yuan

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Hangzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Traction system for elevator and elevator system
- Patent number 11,203,511
- Issue date Dec 21, 2021
- Otis Elevator Company
- WeiHua Yuan
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Rust removing device for elevator guide rail
- Patent number 10,246,297
- Issue date Apr 2, 2019
- Otis Elevator Company
- YuHang Ou
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
TRACTION SYSTEM FOR ELEVATOR AND ELEVATOR SYSTEM
- Publication number 20190127182
- Publication date May 2, 2019
- Otis Elevator Company
- WeiHua Yuan
- B66 - HOISTING LIFTING HAULING
Information Patent Application
RUST REMOVING DEVICE FOR ELEVATOR GUIDE RAIL
- Publication number 20160325967
- Publication date Nov 10, 2016
- Otis Elevator Company
- YuHang Ou
- B66 - HOISTING LIFTING HAULING