Yanlong CHEN

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Jiangsu, CN

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Patents Grantslast 30 patents

Information Patent Grant
Mechanical constant-resistance single prop continuous prop lifting...
- Patent number 10,844,717
- Issue date Nov 24, 2020
- China University of Mining and Technology
- Yanlong Chen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus and method for pre-loading mechanical constant-resistance...
- Patent number 10,385,692
- Issue date Aug 20, 2019
- China University of Mining and Technology
- Jixiong Zhang
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
MECHANICAL CONSTANT-RESISTANCE SINGLE PROP CONTINUOUS PROP LIFTING...
- Publication number 20200240269
- Publication date Jul 30, 2020
- CHINA UNIVERSITY OF MINING AND TECHNOLOGY
- Yanlong Chen
- E21 - EARTH DRILLING MINING
Information Patent Application
APPARATUS AND METHOD FOR PRE-LOADING MECHANICAL CONSTANT-RESISTANCE...
- Publication number 20190085690
- Publication date Mar 21, 2019
- CHINA UNIVERSITY OF MINING AND TECHNOLOGY
- Jixiong ZHANG
- E21 - EARTH DRILLING MINING