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TOKYO, JP
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Patents Grants
last 30 patents
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Patent Grant
High-strength, damage-resistant rail having hardness distribution o...
Patent number
6,361,625
Issue date
Mar 26, 2002
NKK Corporation
Masahisa Fujikake
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Patent Grant
High-strength, bainitic steel rail having excellent damage-resistance
Patent number
5,676,772
Issue date
Oct 14, 1997
NKK Corporation
Kazutaka Kobayashi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Patents Applications
last 30 patents
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Patent Application
HIGH-STRENGTH, DAMAGE-RESISTANT RAIL HAVING HARDNESS DISTRIBUTION O...
Publication number
20020011283
Publication date
Jan 31, 2002
MASAHISA FUJIKAKE
C21 - METALLURGY OF IRON