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Katsuaki Shiiki
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Saitama, JP
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last 30 patents
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Patent Grant
Heat-treated steel wire for high strength spring
Patent number
7,575,646
Issue date
Aug 18, 2009
Nippon Steel Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
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last 30 patents
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Patent Application
Bainite type non-refined steel for nitriding, method for production...
Publication number
20050022906
Publication date
Feb 3, 2005
Takaaki Harasaki
C21 - METALLURGY OF IRON