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SiSi Zheng
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Hangzhou, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Elevator car
Patent number
D846149
Issue date
Apr 16, 2019
Otis Elevator Company
Sisi Zheng
D25 - Building units and construction elements
Information
Patent Grant
Elevator car
Patent number
D846150
Issue date
Apr 16, 2019
Otis Elevator Company
Wei Li
D25 - Building units and construction elements
Information
Patent Grant
Elevator car
Patent number
D846148
Issue date
Apr 16, 2019
Otis Elevator Company
Zhe Li
D25 - Building units and construction elements
Information
Patent Grant
Elevator car
Patent number
D844839
Issue date
Apr 2, 2019
Otis Elevator Company
Wei Li
D25 - Building units and construction elements
Information
Patent Grant
Lighting fixture
Patent number
D843633
Issue date
Mar 19, 2019
Otis Elevator Company
SiSi Zheng
D26 - Lighting
Patents Applications
last 30 patents
Information
Patent Application
METHOD FOR INDICATING ELEVATOR SERVICE STATUS AND ELEVATOR CALL DEVICE
Publication number
20230312304
Publication date
Oct 5, 2023
Otis Elevator Company
Zhe Li
B66 - HOISTING LIFTING HAULING