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Toshio Akiyama
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Tochigi, JP
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last 30 patents
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Patent Grant
Joint for steel pipe having high galling resistance and surface tre...
Patent number
6,027,145
Issue date
Feb 22, 2000
Nippon Steel Corporation
Eiji Tsuru
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...