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Shanghai, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Synchronizing assembly for elevator door and elevator
Patent number
11,845,631
Issue date
Dec 19, 2023
Otis Elevator Company
Zhiren Liu
B66 - HOISTING LIFTING HAULING
Information
Patent Grant
Coupling device between an elevator car door and a landing door and...
Patent number
11,591,189
Issue date
Feb 28, 2023
Otis Elevator Company
Zhiren Liu
B66 - HOISTING LIFTING HAULING
Information
Patent Grant
Governor assembly for elevator system, elevator safety system and e...
Patent number
11,453,571
Issue date
Sep 27, 2022
Otis Elevator Company
Zhiren Liu
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Patents Applications
last 30 patents
Information
Patent Application
SYNCHRONIZING ASSEMBLY FOR ELEVATOR DOOR AND ELEVATOR
Publication number
20210139285
Publication date
May 13, 2021
Otis Elevator Company
Zhiren Liu
B66 - HOISTING LIFTING HAULING
Information
Patent Application
COUPLING DEVICE BETWEEN AN ELEVATOR CAR DOOR AND A LANDING DOOR AND...
Publication number
20210130135
Publication date
May 6, 2021
Otis Elevator Company
Zhiren Liu
B66 - HOISTING LIFTING HAULING
Information
Patent Application
GOVERNOR ASSEMBLY FOR ELEVATOR SYSTEM, ELEVATOR SAFETY SYSTEM AND E...
Publication number
20200407193
Publication date
Dec 31, 2020
Otis Elevator Company
Zhiren Liu
B66 - HOISTING LIFTING HAULING