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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
Information
Patent Grant
Method for manufacturing a high strength rail with good toughness
Patent number
4,933,024
Issue date
Jun 12, 1990
NKK Corporation
Kozo Fukuda
C21 - METALLURGY OF IRON
Information
Patent Grant
Method for heat-treating steel rail head
Patent number
4,886,558
Issue date
Dec 12, 1989
NKK Corporation
Toyokazu Teramoto
C21 - METALLURGY OF IRON
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