Minggao Qing

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Sichuan, CN

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Patents Grantslast 30 patents

Information Patent Grant
One-piece core manufacturing method for swing bolster and sideframe...
- Patent number 8,151,861
- Issue date Apr 10, 2012
- CSR Meishan Rolling Stock Co., Ltd.
- Yundong Wang
- B61 - RAILWAYS

Patents Applicationslast 30 patents

Information Patent Application
ONE-PIECE CORE MANUFACTURING METHOD FOR SWING BOLSTER AND SIDEFRAME...
- Publication number 20100126687
- Publication date May 27, 2010
- CSR MEISHAN ROLLING STOCK CO., LTD,
- Yundong Wang
- B61 - RAILWAYS