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Tianjin, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Elevator balance weight rescue device, an elevator and an elevator...
Patent number
11,492,232
Issue date
Nov 8, 2022
Otis Elevator Company
Qing Li
B66 - HOISTING LIFTING HAULING
Information
Patent Grant
Guide device and elevator system
Patent number
11,358,833
Issue date
Jun 14, 2022
Otis Elevator Company
Qing Li
B66 - HOISTING LIFTING HAULING
Patents Applications
last 30 patents
Information
Patent Application
GUIDE DEVICE AND ELEVATOR SYSTEM
Publication number
20210053796
Publication date
Feb 25, 2021
Otis Elevator Company
Qing Li
B66 - HOISTING LIFTING HAULING
Information
Patent Application
ELEVATOR BALANCE WEIGHT RESCUE DEVICE, AN ELEVATOR AND AN ELEVATOR...
Publication number
20200055699
Publication date
Feb 20, 2020
Otis Elevator Company
Qing Li
B66 - HOISTING LIFTING HAULING
Information
Patent Application
LIMITING MECHANISM FOR AN ELEVATOR COMPENSATION ROPE TENSIONING PUL...
Publication number
20170022030
Publication date
Jan 26, 2017
Otis Elevator Company
Hebin Bai
B66 - HOISTING LIFTING HAULING