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Lifei Cheng
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Hangzhou, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Apparatus and method for controlling passenger transportation device
Patent number
11,993,486
Issue date
May 28, 2024
Otis Elevator Company
Lifei Cheng
B66 - HOISTING LIFTING HAULING
Information
Patent Grant
Determination of operation mode for AC asynchronous three-phrase mo...
Patent number
11,764,716
Issue date
Sep 19, 2023
Otis Elevator Company
Lifei Cheng
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Speed detection device and passenger conveyer device
Patent number
11,078,050
Issue date
Aug 3, 2021
Otis Elevator Company
Lifei Cheng
G01 - MEASURING TESTING
Information
Patent Grant
Handrail automatically tensioning system and a method for adjusting...
Patent number
10,865,074
Issue date
Dec 15, 2020
Otis Elevator Company
QingXi Cai
B66 - HOISTING LIFTING HAULING
Patents Applications
last 30 patents
Information
Patent Application
HEATING CONTROL DEVICE AND METHOD FOR ESCALATOR SYSTEM OR MOVING SI...
Publication number
20240010468
Publication date
Jan 11, 2024
Otis Elevator Company
Xinwei Gong
B66 - HOISTING LIFTING HAULING
Information
Patent Application
DETERMINATION OF OPERATION MODE FOR AC ASYNCHRONOUS THREE-PHRASE MO...
Publication number
20230318502
Publication date
Oct 5, 2023
Otis Elevator Company
Lifei Cheng
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
APPARATUS AND METHOD FOR CONTROLLING PASSENGER TRANSPORTATION DEVICE
Publication number
20230094547
Publication date
Mar 30, 2023
Otis Elevator Company
Lifei Cheng
B66 - HOISTING LIFTING HAULING
Information
Patent Application
HANDRAIL AUTOMATICALLY TENSIONING SYSTEM AND A METHOD FOR ADJUSTING...
Publication number
20200087116
Publication date
Mar 19, 2020
Otis Elevator Company
QingXi Cai
B66 - HOISTING LIFTING HAULING
Information
Patent Application
SPEED DETECTION DEVICE AND PASSENGER CONVEYER DEVICE
Publication number
20190263634
Publication date
Aug 29, 2019
Otis Elevator Company
Lifei Cheng
B66 - HOISTING LIFTING HAULING