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Hiroshi Hagiwara
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
High strength spring steel and steel wire
Patent number
10,131,973
Issue date
Nov 20, 2018
Nippon Steel & Sumitomo Metal Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Grant
High strength spring-use heat treated steel
Patent number
8,845,825
Issue date
Sep 30, 2014
Nippon Steel & Sumitomo Metal Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Grant
Method of production of steel superior in machinability
Patent number
8,137,484
Issue date
Mar 20, 2012
Nippon Steel Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Grant
High-strength spring steel wire
Patent number
7,789,974
Issue date
Sep 7, 2010
Nippon Steel Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Grant
Heat-treated steel wire for high strength spring
Patent number
7,575,646
Issue date
Aug 18, 2009
Nippon Steel Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Grant
Superior in machinability and method of production of same
Patent number
7,488,396
Issue date
Feb 10, 2009
Nippon Steel Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Grant
High toughness spring steel
Patent number
6,406,565
Issue date
Jun 18, 2002
Nippon Steel Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Grant
Steel wire for high-strength springs and method of producing the same
Patent number
6,338,763
Issue date
Jan 15, 2002
Nippon Steel Corporation
Masayuki Hashimura
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
Information
Patent Application
High Strength Spring Steel and High Strength Heat Treated Steel Wir...
Publication number
20100028196
Publication date
Feb 4, 2010
Masayuki Hashimura
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
High strength spring-use heat treated steel
Publication number
20090205753
Publication date
Aug 20, 2009
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Application
High strength spring-use heat treated steel
Publication number
20090092516
Publication date
Apr 9, 2009
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Application
Steel superior in machinability and method of production of same
Publication number
20090050241
Publication date
Feb 26, 2009
NIPPON STEEL CORPORATION
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Application
High Strength Spring Steel and Steel Wire
Publication number
20080279714
Publication date
Nov 13, 2008
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Application
Steel superior in machinability and method of production of same
Publication number
20060013720
Publication date
Jan 19, 2006
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Application
Heat-treated steel wire for high strength spring
Publication number
20040112473
Publication date
Jun 17, 2004
Masayuki Hashimura
C21 - METALLURGY OF IRON
Information
Patent Application
High-strength spring steel and spring steel wire
Publication number
20030201036
Publication date
Oct 30, 2003
Masayuki Hashimura
C21 - METALLURGY OF IRON