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Chiaki AKAMATSU
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Osaka, JP
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last 30 patents
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Patent Grant
Test apparatus for a threaded joint for oil country tubular goods
Patent number
8,800,381
Issue date
Aug 12, 2014
Nippon Steel & Sumitomo Metal Corporation
Chiaki Akamatsu
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Patents Applications
last 30 patents
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Patent Application
TEST APPARATUS FOR A THREADED JOINT FOR OIL COUNTRY TUBULAR GOODS
Publication number
20130019690
Publication date
Jan 24, 2013
Chiaki AKAMATSU
G01 - MEASURING TESTING