Jinyan LIANG

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Chongqing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Hole protection system and method for coal seam slotting and fractu...
- Patent number 11,970,945
- Issue date Apr 30, 2024
- Hancheng Zaozhuang Industrial Co., Ltd.
- Xiaoyan Sun
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
HOLE PROTECTION SYSTEM AND METHOD FOR COAL SEAM SLOTTING AND FRACTU...
- Publication number 20230313682
- Publication date Oct 5, 2023
- Hancheng Zaozhuang Industrial Co., Ltd.
- Xiaoyan SUN
- E21 - EARTH DRILLING MINING
Information Patent Application
METHOD FOR DETERMINING SECONDARY RESERVOIR FORMATION BOUNDARIES AND...
- Publication number 20230167718
- Publication date Jun 1, 2023
- Hancheng Zaozhuang Industrial Co., Ltd.
- Xiaoyan SUN
- E21 - EARTH DRILLING MINING