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Osamu Umezawa
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Ibaraki, JP
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Patents Grants
last 30 patents
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Patent Grant
Fine ferrite-based structure steel production method
Patent number
6,572,716
Issue date
Jun 3, 2003
National Research Institute for Metals
Tohru Hayashi
C21 - METALLURGY OF IRON
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Patent Grant
Production method of ultra fine grain steel
Patent number
6,464,807
Issue date
Oct 15, 2002
Japan as represented by Director General of National Research Institute for M...
Shiro Torizuka
C21 - METALLURGY OF IRON
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Patent Grant
Ultra-fine grain steel and method for producing it
Patent number
6,221,178
Issue date
Apr 24, 2001
National Research Institute for Metals
Shiro Torizuka
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
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Patent Application
FINE FERRITE-BASED STRUCTURE STEEL AND PRODUCTION METHOD THEREOF
Publication number
20020014285
Publication date
Feb 7, 2002
TOHRU HAYASHI
C21 - METALLURGY OF IRON