XIANGRUI LI

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QINGDAO, CN

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Patents Grantslast 30 patents

Information Patent Grant
Hand brake limiting device
- Patent number 9,932,053
- Issue date Apr 3, 2018
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO., LTD.
- Jingquan Bi
- B61 - RAILWAYS
Information Patent Grant
Hand brake
- Patent number 9,828,009
- Issue date Nov 28, 2017
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO., LTD.
- Jingquan Bi
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Testing device for electromagnetic attraction force of a magnetic t...
- Patent number 9,677,959
- Issue date Jun 13, 2017
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO., LTD.
- Xiangrui Li
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
TESTING DEVICE FOR ELECTROMAGNETIC ATTRACTION FORCE OF A MAGNETIC T...
- Publication number 20170052080
- Publication date Feb 23, 2017
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO., LTD.
- XIANGRUI LI
- G01 - MEASURING TESTING
Information Patent Application
HAND BRAKE LIMITING DEVICE
- Publication number 20160347335
- Publication date Dec 1, 2016
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO., LTD.
- JINGQUAN BI
- B61 - RAILWAYS
Information Patent Application
HAND BRAKE
- Publication number 20160257317
- Publication date Sep 8, 2016
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH
- JINGQUAN BI
- B61 - RAILWAYS