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Yasusuke Inoue
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Sagamiharashi, JP
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last 30 patents
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Patent Grant
Bent pipe having sectional form of high strength
Patent number
5,339,868
Issue date
Aug 23, 1994
Nippon Steel Corporation
Hisashi Naoi
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Patent Grant
Threaded joint with high gas-leak-tightness for oil and gas well pipe
Patent number
4,377,302
Issue date
Mar 22, 1983
Nippon Steel Corporation
Fuzimasa Kohyama
E21 - EARTH DRILLING MINING