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Qingdao, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Method, system and device for controlling door of railway vehicle
Patent number
11,125,006
Issue date
Sep 21, 2021
CRRC Qingdao Sifang Co., Ltd.
Bo Chen
B61 - RAILWAYS
Information
Patent Grant
Alarming and unlocking device
Patent number
10,464,524
Issue date
Nov 5, 2019
CRRC QINGDAO SIFANG CO., LTD.
Bo Chen
B60 - VEHICLES IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
METHOD, SYSTEM AND DEVICE FOR CONTROLLING DOOR OF RAILWAY VEHICLE
Publication number
20190024436
Publication date
Jan 24, 2019
CRRC QINGDAO SIFANG CO., LTD.
Bo Chen
B61 - RAILWAYS
Information
Patent Application
ALARMING AND UNLOCKING DEVICE
Publication number
20190023222
Publication date
Jan 24, 2019
CRRC QINGDAO SIFANG CO., LTD.
Bo CHEN
B60 - VEHICLES IN GENERAL