Changlong Du

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Jiangsu, CN

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Patents Grantslast 30 patents

Information Patent Grant
Hard rock roadway and tunnel boring machine with actively rotating...
- Patent number 11,199,092
- Issue date Dec 14, 2021
- China University of Mining and Technology
- Hongxiang Jiang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drilling and bursting heading machine
- Patent number 10,233,755
- Issue date Mar 19, 2019
- China University of Mining and Technology
- Songyong Liu
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
HARD ROCK ROADWAY AND TUNNEL BORING MACHINE WITH ACTIVELY ROTATING...
- Publication number 20210231013
- Publication date Jul 29, 2021
- CHINA UNIVERSITY OF MINING AND TECHNOLOGY
- Hongxiang JIANG
- E21 - EARTH DRILLING MINING
Information Patent Application
Drilling and Bursting Heading Machine
- Publication number 20180195388
- Publication date Jul 12, 2018
- Songyong Liu
- E21 - EARTH DRILLING MINING