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Guangzhou City, CN
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Patents Grants
last 30 patents
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Patent Grant
Natural gas hydrate pressure-retaining corer
Patent number
10,837,247
Issue date
Nov 17, 2020
GUANGZHOU MARINE GEOLOGICAL SURVEY
Xuwen Qin
E21 - EARTH DRILLING MINING
Information
Patent Grant
Natural gas hydrate rotary pressure-retaining corer
Patent number
10,822,903
Issue date
Nov 3, 2020
GUANGZHOU MARINE GEOLOGICAL SURVEY
Jianliang Ye
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
NATURAL GAS HYDRATE ROTARY PRESSURE-RETAINING CORER
Publication number
20200181998
Publication date
Jun 11, 2020
Guangzhou Marine Geological Survey
Jianliang YE
E21 - EARTH DRILLING MINING
Information
Patent Application
NATURAL GAS HYDRATE-BEARING SEDIMENT INTERGRANULAR MICRO-FORCE TES...
Publication number
20200072734
Publication date
Mar 5, 2020
Guangzhou Marine Geological Survey
Jianliang YE
G01 - MEASURING TESTING
Information
Patent Application
NATURAL GAS HYDRATE PRESSURE-RETAINING CORER
Publication number
20190368294
Publication date
Dec 5, 2019
Guangzhou Marine Geological Survey
Xuwen QIN
E21 - EARTH DRILLING MINING