Qingwei Chen

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Chengdu, CN

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Patents Grantslast 30 patents

Information 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 Applicationslast 30 patents

Information Patent Application
Stacked City Road
- Publication number 20140377000
- Publication date Dec 25, 2014
- Qingwei Chen
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES