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Yuji Koyama
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Kitakyushu City, JP
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Patents Grants
last 30 patents
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Patent Grant
Cast steel and steel material with excellent workability, method fo...
Patent number
6,918,969
Issue date
Jul 19, 2005
Nippon Steel Corporation
Masafumi Zeze
C21 - METALLURGY OF IRON
Information
Patent Grant
Fuel tank made of ferritic stainless steel
Patent number
6,645,318
Issue date
Nov 11, 2003
Nippon Steel Corporation
Akihiko Takahashi
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Cast steel piece and steel product excellent in forming characteris...
Patent number
6,585,799
Issue date
Jul 1, 2003
Nippon Steel Corporation
Masafumi Zeze
C21 - METALLURGY OF IRON
Information
Patent Grant
Ferritic stainless steel for exhaust system equipment of vehicle
Patent number
5,843,370
Issue date
Dec 1, 1998
Nippon Steel Corporation
Yuji Koyama
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Patents Applications
last 30 patents
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Patent Application
Cast steel and steel material with excellent workability, method fo...
Publication number
20030015260
Publication date
Jan 23, 2003
NIPPON STEEL CORPORATION
Masafumi Zeze
C21 - METALLURGY OF IRON
Information
Patent Application
Fuel tank made of ferritic stainless steel
Publication number
20020012602
Publication date
Jan 31, 2002
Akihiko Takahashi
B60 - VEHICLES IN GENERAL