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Tatsuya KUMAGAI
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Tokyo, JP
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Patents Grants
last 30 patents
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Patent Grant
Flux-cored wire, manufacturing method of welded joint, and welded j...
Patent number
10,946,486
Issue date
Mar 16, 2021
Nippon Steel Corporation
Kotaro Watanabe
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Flux-cored wire for gas-shielded arc welding, method for welding st...
Patent number
9,770,789
Issue date
Sep 26, 2017
Nippon Steel & Sumitomo Metal Corporation
Suo Saruwatari
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
High-strength steel plate and producing method therefor
Patent number
8,500,924
Issue date
Aug 6, 2013
Nippon Steel & Sumitomo Metal Corporation
Tatsuya Kumagai
C21 - METALLURGY OF IRON
Information
Patent Grant
High-tensile steel plate of low acoustic anisotropy and high weldab...
Patent number
8,246,768
Issue date
Aug 21, 2012
Nippon Steel Corporation
Manabu Hoshino
C21 - METALLURGY OF IRON
Information
Patent Grant
High-strength steel plate and producing method therefor
Patent number
8,216,400
Issue date
Jul 10, 2012
Nippon Steel Corporation
Tatsuya Kumagai
C21 - METALLURGY OF IRON
Information
Patent Grant
High toughness abrasion resistant steel with little change in hardn...
Patent number
8,097,099
Issue date
Jan 17, 2012
Nippon Steel Corporation
Naoki Saitoh
C21 - METALLURGY OF IRON
Information
Patent Grant
Method of producing non-oriented magnetic steel plate having high m...
Patent number
5,062,905
Issue date
Nov 5, 1991
Nippon Steel Corporation
Yukio Tomita
C21 - METALLURGY OF IRON
Information
Patent Grant
Method of producing non-oriented magnetic steel heavy plate having...
Patent number
4,950,336
Issue date
Aug 21, 1990
Nippon Steel Corporation
Yukio Tomita
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
Information
Patent Application
FLUX-CORED WIRE, MANUFACTURING METHOD OF WELDED JOINT, AND WELDED J...
Publication number
20200070273
Publication date
Mar 5, 2020
NIPPON STEEL & SUMITOMO METAL CORPORATION
Kotaro WATANABE
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
FLUX-CORED WIRE, MANUFACTURING METHOD OF WELDED JOINT, AND WELDED J...
Publication number
20190030655
Publication date
Jan 31, 2019
NIPPON STEEL & SUMITOMO METAL CORPORATION
Kotaro WATANABE
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
FLUX-CORED WIRE FOR GAS-SHIELDED ARC WELDING, METHOD FOR WELDING ST...
Publication number
20160129532
Publication date
May 12, 2016
Suo SARUWATARI
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
HIGH-STRENGTH STEEL PLATE AND PRODUCING METHOD THEREFOR
Publication number
20110253271
Publication date
Oct 20, 2011
Tatsuya Kumagai
B66 - HOISTING LIFTING HAULING
Information
Patent Application
HIGH-STRENGTH STEEL PLATE AND PRODUCING METHOD THEREFOR
Publication number
20100230016
Publication date
Sep 16, 2010
Tatsuya Kumagai
C21 - METALLURGY OF IRON
Information
Patent Application
WEAR-RESISTANT STEEL PLATE HAVING EXCELLENT WEAR RESISTANCE AT HIGH...
Publication number
20100139820
Publication date
Jun 10, 2010
Tatsuya Kumagai
C21 - METALLURGY OF IRON
Information
Patent Application
High-Tensile Steel Plate of Low Acoustic Anisotropy and High Weldab...
Publication number
20090107591
Publication date
Apr 30, 2009
Manabu Hoshino
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
High Tension Steel Plate with Small Acoustic Anisotropy and with Ex...
Publication number
20080295920
Publication date
Dec 4, 2008
Tatsuya Kumagai
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
High tensile steel excellent in high temperature strength and metho...
Publication number
20060065335
Publication date
Mar 30, 2006
Yasushi Mizutani
C21 - METALLURGY OF IRON
Information
Patent Application
High-strength steel for welded structures excellent in high tempera...
Publication number
20060016526
Publication date
Jan 26, 2006
Yasushi Mizutani
C21 - METALLURGY OF IRON