Inventor · disambiguated record
Masafumi Azuma
Also filed as: AZUMA MASAFUMI
53 granted patents·12 pending applications·107 citations·filing 2002–2023
97Inventor score
Files withNIPPON STEEL CORP31NIPPON STEEL & SUMITOMO METAL CORP25AZUMA MASAFUMI3FUJITA NOBUHIRO1KAWATA HIROYUKI1
Top patents by PatentIndex Score
65 records- 0196US10563281B2Heat-treated steel sheet member and method for producing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Feb 18, 2020·6 cites·13 claims
- 0294US12215402B2Hot-rolled steel sheetNIPPON STEEL CORP·Filed 2020·Granted Feb 4, 2025·2 cites·19 claims
- 0394US12018344B2High-strength steel sheet and method for manufacturing sameNIPPON STEEL CORP·Filed 2020·Granted Jun 25, 2024·2 cites·8 claims
- 0493US9109275B2High-strength galvanized steel sheet and method of manufacturing the sameMORIMOTO YASUHIDE·Filed 2010·Granted Aug 18, 2015·18 cites·6 claims
- 0592US9783878B2High-strength hot-dip galvanized steel sheet and high-strength alloyed hot-dip galvanized steel sheet having excellent plating adhesion, formability, and hole expandability with tensile strength of 980 MPa or more and manufacturing method thereforNIPPON STEEL & SUMITOMO METAL CORP·Filed 2012·Granted Oct 10, 2017·5 cites·8 claims
- 0690US11473164B2High-strength cold-rolled steel sheet and manufacturing method thereforNIPPON STEEL CORP·Filed 2019·Granted Oct 18, 2022·3 cites·12 claims
- 0789US8460481B2High-strength steel sheet and galvanized steel sheet having very good balance between hole expansibility and ductility, and also excellent in fatigue resistance, and methods of producing the steel sheetsAZUMA MASAFUMI·Filed 2009·Granted Jun 11, 2013·9 cites·10 claims
- 0888US10407760B2Hot-dip galvanized steel sheet and manufacturing method thereofNIPPON STEEL & SUMITOMO METAL CORP·Filed 2012·Granted Sep 10, 2019·4 cites·16 claims
- 0987US10465272B2High-strength hot-dip galvanized steel sheet and high-strength alloyed hot-dip galvanized steel sheet having excellent plating adhesion, formability, and hole expandability with tensile strength of 980 MPa or more and manufacturing method thereforNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Granted Nov 5, 2019·1 cites·8 claims
- 1087US10301699B2Hot-stamped part and method of manufacturing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted May 28, 2019·3 cites·8 claims
- 1186US11208702B2Hot-rolled steel sheet and manufacturing method thereofNIPPON STEEL & SUMITOMO METAL CORP·Filed 2019·Granted Dec 28, 2021·1 cites·3 claims
- 1286US10260124B2Hot-rolled steel sheet and manufacturing method thereofNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Apr 16, 2019·3 cites·9 claims
- 1385US9970092B2Galvanized steel sheet and method of manufacturing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2012·Granted May 15, 2018·3 cites·20 claims
- 1485US7824509B2High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance, corrosion resistance, ductility and plating adhesion, after severe deformation, and a method of producing the sameNIPPON STEEL CORP·Filed 2007·Granted Nov 2, 2010·5 cites·8 claims
- 1584US8962149B2Spot welded jointOIKAWA HATSUHIKO·Filed 2010·Granted Feb 24, 2015·7 cites·8 claims
- 1684US8216397B2High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance, corrosion resistance, ductility and plating adhesion, after severe deformation, and a method of producing the sameFUJITA NOBUHIRO·Filed 2009·Granted Jul 10, 2012·5 cites·12 claims
- 1782US10787727B2Steel sheetNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Sep 29, 2020·1 cites·5 claims
- 1882US10000829B2Hot-rolled steel sheetNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Jun 19, 2018·2 cites·4 claims
- 1981US10876181B2Cold-rolled steel sheet and method of manufacturing sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Dec 29, 2020·1 cites·11 claims
- 2081US10196726B2High-strength hot-rolled steel sheet having excellent baking hardenability and low temperature toughness with maximum tensile strength of 980 MPa or moreNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Feb 5, 2019·2 cites·7 claims
- 2181US8657970B2Hot-rolled steel sheet excellent in fatigue properties and stretch-flange formability and method for manufacturing the sameYOSHINAGA NAOKI·Filed 2008·Granted Feb 25, 2014·4 cites·9 claims
- 2280US10822672B2Steel sheet, hot-dip galvanized steel sheet, galvanized steel sheet, and manufacturing methods thereforNIPPON STEEL & SUMITOMO METAL CORP·Filed 2015·Granted Nov 3, 2020·1 cites·8 claims
- 2380US10808291B2Steel sheet, hot-dip galvanized steel sheet, galvannealed steel sheet, and manufacturing methods thereforNIPPON STEEL & SUMITOMO METAL CORP·Filed 2015·Granted Oct 20, 2020·1 cites·22 claims
- 2480US9610648B2Spot welded joint and spot welding methodNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Apr 4, 2017·3 cites·14 claims
- 2575US9694561B2High strength steel sheet and high strength galvanized steel sheet excellent in shapeability and methods of production of sameKAWATA HIROYUKI·Filed 2012·Granted Jul 4, 2017·1 cites·20 claims
- 2674US9540720B2High-strength hot-dip galvanized steel sheet and high-strength alloyed hot-dip galvanized steel sheet having excellent formability and small material anisotropy with ultimate tensile strength of 980 MPa or moreNIPPON STEEL & SUMITOMO METAL CORP·Filed 2012·Granted Jan 10, 2017·4 cites·6 claims
- 2772US10023929B2Hot-rolled steel sheetNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Jul 17, 2018·1 cites·6 claims
- 2872US7267890B2High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance corrosion resistance ductility and plating adhesion after servere deformation and a method of producing the sameNIPPON STEEL CORP·Filed 2002·Granted Sep 11, 2007·9 cites·32 claims
- 2970US2025146094A1Cold-rolled steel sheet and method for manufacturing sameNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 3068US12454736B2Cold-rolled steel sheet and method for manufacturing sameNIPPON STEEL CORP·Filed 2022·Granted Oct 28, 2025·0 cites·15 claims
- 3168US12123095B2Hot-dip galvanized steel sheetNIPPON STEEL CORP·Filed 2021·Granted Oct 22, 2024·0 cites·4 claims
- 3268US2025066887A1Steel sheet for hot-stamping, method for manufacturing steel sheet for hot-stamping, and hot-stamped formed bodyNIPPON STEEL CORP·Filed 2023·Application pending·0 cites
- 3366US12416060B2High-strength steel sheetNIPPON STEEL CORP·Filed 2021·Granted Sep 16, 2025·0 cites·3 claims
- 3465US12221661B2Steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2020·Granted Feb 11, 2025·0 cites·13 claims
- 3565US2023416856A1Steel sheet for gas soft nitridingNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 3663US2025215545A1Cold-rolled steel sheetNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 3763US2024011113A1Steel sheet for hot stamping, method for manufacturing the same, hot stamped component, and method for manufacturing the sameNIPPON STEEL CORP·Filed 2021·Application pending·0 cites
- 3862US2025144737A1Method for manufacturing projection weld joint, projection weld joint, and vehicle componentNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 3960US12428689B2Steel sheet and method for manufacturing sameNIPPON STEEL CORP·Filed 2020·Granted Sep 30, 2025·0 cites·16 claims
- 4060US12428696B2Cold-rolled steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2020·Granted Sep 30, 2025·0 cites·20 claims
- 4160US11643147B2Front pillar outerNIPPON STEEL CORP·Filed 2020·Granted May 9, 2023·0 cites·5 claims
- 4259US12331379B2Cold-rolled steel sheet and manufacturing method thereofNIPPON STEEL CORP·Filed 2022·Granted Jun 17, 2025·0 cites·18 claims
- 4358US12473621B2Hot-rolled steel sheetNIPPON STEEL CORP·Filed 2021·Granted Nov 18, 2025·0 cites·6 claims
- 4457US11859260B2Steel sheet and manufacturing method thereofNIPPON STEEL CORP·Filed 2020·Granted Jan 2, 2024·0 cites·9 claims
- 4556US12344911B2High-strength steel sheet and method for manufacturing sameNIPPON STEEL CORP·Filed 2020·Granted Jul 1, 2025·0 cites·9 claims
- 4656US12163209B2Automobile undercarriage partNIPPON STEEL CORP·Filed 2020·Granted Dec 10, 2024·0 cites·5 claims
- 4756US10023947B2High strength steel plate with ultimate tensile strength of 900 MPa or more excellent in hydrogen embrittlement resistance and method of production of sameAZUMA MASAFUMI·Filed 2010·Granted Jul 17, 2018·0 cites·14 claims
- 4854US12209300B2Automobile undercarriage partNIPPON STEEL CORP·Filed 2020·Granted Jan 28, 2025·0 cites·3 claims
- 4953US2024100583A1Burring processing method, burring processing mold, burring processing device, and burring processed productNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 5051US10822680B2Steel sheet for heat treatmentNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Nov 3, 2020·0 cites·4 claims
Showing the top 50 of 65 patent records by PatentIndex Score.
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