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Shuang Chen
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Chengdu, CN
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Patents Grants
last 30 patents
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Patent Grant
Stacked city road
Patent number
9,441,331
Issue date
Sep 13, 2016
Qingwei Chen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Patents Applications
last 30 patents
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Patent Application
Stacked City Road
Publication number
20140377000
Publication date
Dec 25, 2014
Qingwei Chen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES