Inventor
HAYASHI KOUTAROU
JP35 patents
⚠️ This page may combine multiple inventors who share the name “HAYASHI KOUTAROU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON STEEL CORP
19 patentsUS11242583B2Feb 8, 2022
Steel sheet
NIPPON STEEL CORP0 citations61
US11225701B2Jan 18, 2022
Hot dip galvanized steel sheet and hot dip galvannealed steel sheet
NIPPON STEEL CORP0 citations51
US12534785B2Jan 27, 2026
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations50
US12522884B2Jan 13, 2026
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations50
US12516406B2Jan 6, 2026
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations50
US12435382B2Oct 7, 2025
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations50
US12392020B2Aug 19, 2025
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations50
US12180557B2Dec 31, 2024
Cold rolled steel sheet and method for producing same
NIPPON STEEL CORP0 citations50
US12060623B2Aug 13, 2024
High-strength steel sheet with excellent ductility and hole-expandability
NIPPON STEEL CORP0 citations50
US12031203B2Jul 9, 2024
Galvannealed steel sheet
NIPPON STEEL CORP0 citations50
US11505855B2Nov 22, 2022
High-strength steel sheet
NIPPON STEEL CORP0 citations50
US11486028B2Nov 1, 2022
High-strength steel sheet
NIPPON STEEL CORP0 citations50
US12297524B2May 13, 2025
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations49
US12116646B2Oct 15, 2024
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations49
US12203157B2Jan 21, 2025
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations48
US11970758B2Apr 30, 2024
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations48
US12123064B2Oct 22, 2024
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations47
US11634802B2Apr 25, 2023
Cold-rolled steel sheet
NIPPON STEEL CORP0 citations47
US12331378B2Jun 17, 2025
Steel sheet and method for producing same
NIPPON STEEL CORP0 citations45
NIPPON STEEL & SUMITOMO METAL CORP
11 patentsUS10501832B2Dec 10, 2019
Plated steel sheet
NIPPON STEEL & SUMITOMO METAL CORP2 citations72
US10273555B2Apr 30, 2019
Hot-pressed steel sheet member
NIPPON STEEL & SUMITOMO METAL CORP2 citations72
US11365465B2Jun 21, 2022
Steel sheet
NIPPON STEEL & SUMITOMO METAL CORP1 citations61
US10344351B2Jul 9, 2019
Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing
NIPPON STEEL & SUMITOMO METAL CORP1 citations60
US10253387B2Apr 9, 2019
Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing
NIPPON STEEL & SUMITOMO METAL CORP1 citations60
US11732341B2Aug 22, 2023
Metal coated steel sheet, manufacturing method of hot-dip galvanized steel sheet, and manufacturing method of alloyed galvannealed steel sheet
NIPPON STEEL & SUMITOMO METAL CORP0 citations51
US10508317B2Dec 17, 2019
Steel product and manufacturing method of the same
NIPPON STEEL & SUMITOMO METAL CORP0 citations51
US10266911B2Apr 23, 2019
Hot-formed member and manufacturing method of same
NIPPON STEEL & SUMITOMO METAL CORP0 citations51
US10711322B2Jul 14, 2020
Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing
NIPPON STEEL & SUMITOMO METAL CORP0 citations50
US10745775B2Aug 18, 2020
Galvannealed steel sheet and method for producing the same
NIPPON STEEL & SUMITOMO METAL CORP0 citations41
US10774405B2Sep 15, 2020
Steel and method of manufacturing the same
NIPPON STEEL & SUMITOMO METAL CORP0 citations30