Yongfeng Yi

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Qiqihar, CN

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Patents Grantslast 30 patents

Information Patent Grant
Ballast hopper car discharge door control system
- Patent number 8,950,340
- Issue date Feb 10, 2015
- Qiqihar Railway Rolling Stock Co., Ltd.
- Shengkun Wang
- B61 - RAILWAYS
Information Patent Grant
Tank container, tank body and processing method of tank body
- Patent number 8,746,493
- Issue date Jun 10, 2014
- Qiqihar Railway Rolling Stock Co., Ltd.
- Guang Li
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
BALLAST HOPPER CAR
- Publication number 20130019776
- Publication date Jan 24, 2013
- QIQIHAR RAILWAY ROLLING STOCK CO., LTD.
- Shengkun Wang
- B61 - RAILWAYS
Information Patent Application
BALLAST HOPPER CAR DISCHARGE DOOR CONTROL SYSTEM
- Publication number 20130000509
- Publication date Jan 3, 2013
- QIQIHAR RAILWAY ROLLING STOCK CO., LTD.
- Shengkun Wang
- B61 - RAILWAYS
Information Patent Application
TANK CONTAINER, TANK BODY AND PROCESSING METHOD OF TANK BODY
- Publication number 20120018436
- Publication date Jan 26, 2012
- DALIAN QICHE RAILWAY ROLLING STOCK CO., LTD
- Guang Li
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR