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Hirofumi OHTSUBO
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Chiyoda-ku, Tokyo, JP
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Patents Grants
last 30 patents
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Patent Grant
Duplex stainless clad steel plate and method of producing same
Patent number
11,891,675
Issue date
Feb 6, 2024
JFE Steel Corporation
Yota Kuronuma
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Duplex stainless clad steel plate and method of producing same
Patent number
11,692,252
Issue date
Jul 4, 2023
JFE Steel Corporation
Yota Kuronuma
C21 - METALLURGY OF IRON
Information
Patent Grant
High toughness and high tensile strength thick steel plate with exc...
Patent number
10,351,926
Issue date
Jul 16, 2019
JFE Steel Corporation
Yota Kuronuma
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
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Patent Application
RAIL HAVING EXCELLENT FATIGUE CRACK PROPAGATION RESISTANCE CHARACTE...
Publication number
20230279517
Publication date
Sep 7, 2023
JFE STEEL CORPORATION
Keisuke Ando
C21 - METALLURGY OF IRON
Information
Patent Application
DUPLEX STAINLESS CLAD STEEL PLATE AND METHOD OF PRODUCING SAME
Publication number
20210025023
Publication date
Jan 28, 2021
JFE STEEL CORPORATION
Yota KURONUMA
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
DUPLEX STAINLESS CLAD STEEL PLATE AND METHOD OF PRODUCING SAME
Publication number
20210025044
Publication date
Jan 28, 2021
JFE STEEL CORPORATION
Yota KURONUMA
C21 - METALLURGY OF IRON
Information
Patent Application
HIGH TOUGHNESS AND HIGH TENSILE STRENGTH THICK STEEL PLATE WITH EXC...
Publication number
20180155805
Publication date
Jun 7, 2018
JFE STEEL CORPORATION
Yota KURONUMA
C21 - METALLURGY OF IRON