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Shinji Koyama
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Kobe, JP
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last 30 patents
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Patent Grant
Tuyere for blowing gases into molten metal bath container
Patent number
4,417,723
Issue date
Nov 29, 1983
Kabushiki Kaisha Kobe Seiko Sho
Minoru Kitamura
C21 - METALLURGY OF IRON
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Patent Grant
Method for stably refining high carbon steel
Patent number
4,398,949
Issue date
Aug 16, 1983
Kabushiki Kaisha Kobe Seiko Sho
Minoru Kitamura
C21 - METALLURGY OF IRON