Zhigang Wei

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Under-floor lifting jack for high-speed electric multiple unit trai...
- Patent number 9,045,150
- Issue date Jun 2, 2015
- BEIJING RAILWAY INSTITUTE OF MECHANICAL & ELECTRICAL ENGINEERING CO. LTD
- Yinghao Li
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

Information Patent Application
MUD PRESSURE WAVE SIGNAL MODULATION APPARATUS AND METHOD
- Publication number 20240247586
- Publication date Jul 25, 2024
- CHINA NATIONAL PETROLEUM CORPORATION
- Jiajin Wang
- E21 - EARTH DRILLING MINING
Information Patent Application
UNDER-FLOOR LIFTING JACK FOR HIGH-SPEED ELECTRIC MULTIPLE UNIT TRAI...
- Publication number 20120025158
- Publication date Feb 2, 2012
- Yinghao Li
- B61 - RAILWAYS