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Ah Chai LIM
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Singapore, SG
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Patents Grants
last 30 patents
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Patent Grant
Wellhead pressure plug
Patent number
9,708,875
Issue date
Jul 18, 2017
NUSTAR TECHNOLOGIES PTE LTD
Ah Chai Lim
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
WELLHEAD PRESSURE PLUG
Publication number
20150034338
Publication date
Feb 5, 2015
Nustar Technologies Pte Ltd
Ah Chai LIM
E21 - EARTH DRILLING MINING