Qingdao Nianxin Environment Tech Co., Ltd.

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Jiaozhou City, Qingdao, Shandong, CN

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Patents Grantslast 30 patents

Information Patent Grant
Longitudinal sleeper and damping railway system thereof
- Patent number 8,727,229
- Issue date May 20, 2014
- Qingdao Nianxin Environment Tech Co., Ltd.
- Lin Qi
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

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Patents Applicationslast 30 patents

Information Patent Application
LONGITUDINAL SLEEPER AND DAMPING RAILWAY SYSTEM THEREOF
- Publication number 20120286056
- Publication date Nov 15, 2012
- Qingdao Nianxin Environment Tech Co., Ltd.
- Lin Qi
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES