Inventor
FUJII HIROYASU
JP53 patents
⚠️ This page may combine multiple inventors who share the name “FUJII HIROYASU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON STEEL CORP
42 patentsUS7471182B2Dec 30, 2008
Core having superior end face insulation and method of treating core end faces to give insulation coating
NIPPON STEEL CORP38 citations91
US5961744AOct 5, 1999
Grain oriented silicon steel sheet having low core loss and method of manufacturing same
NIPPON STEEL CORP34 citations91
US5565272AOct 15, 1996
Grain oriented silicon steel sheet having excellent primary film properties
NIPPON STEEL CORP39 citations90
US6461741B1Oct 8, 2002
Grain-oriented electromagnetic steel sheet with excellent coating properties and process for its manufacture
NIPPON STEEL CORP14 citations84
US7736449B2Jun 15, 2010
High-strength hot-dip galvanized steel sheet and method for producing the same
NIPPON STEEL CORP14 citations83
US7294412B2Nov 13, 2007
High-strength hop-dip galvanized steel sheet
NIPPON STEEL CORP12 citations83
US6613160B2Sep 2, 2003
Method to produce grain-oriented electrical steel sheet having high magnetic flux density
NIPPON STEEL CORP10 citations74
US5509976AApr 23, 1996
Method for producing a grain-oriented electrical steel sheet having a mirror surface and improved core loss
NIPPON STEEL CORP9 citations74
US5190597AMar 2, 1993
Process for producing grain-oriented electrical steel sheet having improved magnetic and surface film properties
NIPPON STEEL CORP7 citations74
US5129965AJul 14, 1992
Method of producing grain oriented silicon steel sheets each having a low watt loss and a mirror surface
NIPPON STEEL CORP7 citations74
US11742129B2Aug 29, 2023
Adhesively-laminated core, manufacturing method thereof, and electric motor
NIPPON STEEL CORP2 citations73
US5782998AJul 21, 1998
Grain oriented electrical steel sheet having specular surface
NIPPON STEEL CORP7 citations73
US12266971B2Apr 1, 2025
Adhesively-laminated core for stator, method of manufacturing the same, and electric motor
NIPPON STEEL CORP1 citations64
US12217889B2Feb 4, 2025
Grain-oriented electrical steel sheet, and steel sheet serving as base sheet for grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations63
US11499055B2Nov 15, 2022
Coating solution for forming insulating film for grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations63
US7850792B2Dec 14, 2010
Grain-oriented electrical steel sheet having insulating film not containing chromium and insulating film agent of same
NIPPON STEEL CORP6 citations63
US7364629B2Apr 29, 2008
Method for manufacturing grain-oriented silicon steel sheets with mirror-like surface
NIPPON STEEL CORP2 citations63
US12378676B2Aug 5, 2025
Grain-oriented electrical steel sheet and manufacturing method of the same
NIPPON STEEL CORP0 citations62
US12215398B2Feb 4, 2025
Coating liquid for forming insulation coating for grain-oriented electrical steel sheets, grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations62
US12157921B2Dec 3, 2024
Coating liquid for forming insulation coating for grain-oriented electrical steel sheet, method of manufacturing grain-oriented electrical steel sheet, and grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations62
US12123068B2Oct 22, 2024
Grain oriented electrical steel sheet and producing method thereof
NIPPON STEEL CORP0 citations62
US12104096B2Oct 1, 2024
Laminated core, laminated core manufacturing method, and electric motor
NIPPON STEEL CORP1 citations62
US12033776B2Jul 9, 2024
Non-oriented electrical steel sheet and method for manufacturing same
NIPPON STEEL CORP0 citations62
US11884988B2Jan 30, 2024
Base sheet for grain-oriented electrical steel sheet, grain-oriented silicon steel sheet which is used as material of base sheet for grain-oriented electrical steel sheet, method of manufacturing base sheet for grain-oriented electrical steel sheet, and method of manufacturing grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations62
US11855485B2Dec 26, 2023
Laminated core, method of manufacturing same, and electric motor
NIPPON STEEL CORP1 citations62
US11450460B2Sep 20, 2022
Grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations62
US11346005B2May 31, 2022
Grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations62
US11189407B2Nov 30, 2021
Grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations62
US11060159B2Jul 13, 2021
Grain-oriented electrical steel sheet and method of manufacturing grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations62
US6713187B2Mar 30, 2004
Grain-oriented silicon steel sheet excellent in adhesiveness to tension-creating insulating coating films and method for producing the same
NIPPON STEEL CORP2 citations62
US12215399B2Feb 4, 2025
Non-oriented electrical steel sheet and method for producing same
NIPPON STEEL CORP0 citations61
US7998284B2Aug 16, 2011
Grain-oriented electrical steel sheet having high tensile strength insulating film and method of treatment of such insulating film
NIPPON STEEL CORP5 citations60
US11948710B2Apr 2, 2024
Non-oriented electrical steel sheet and method for producing same
NIPPON STEEL CORP0 citations58
US12492477B2Dec 9, 2025
Non-oriented electrical steel sheet and surface treatment agent for non-oriented electrical steel sheet
NIPPON STEEL CORP0 citations52
US12469625B2Nov 11, 2025
Non-oriented electrical steel sheet
NIPPON STEEL CORP0 citations52
US12365973B2Jul 22, 2025
Manufacturing method of grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations52
US12359275B2Jul 15, 2025
Method for manufacturing grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations52
US12180558B2Dec 31, 2024
Method for manufacturing grain-oriented electrical steel sheet
NIPPON STEEL CORP0 citations52
US11990795B2May 21, 2024
Adhesively-laminated core for stator, method of manufacturing same, and electric motor
NIPPON STEEL CORP0 citations52
US6733599B2May 11, 2004
Method for producing grain-oriented silicon steel sheet not having inorganic mineral film
NIPPON STEEL CORP1 citations52
US12580107B2Mar 17, 2026
Grain oriented electrical steel sheet and producing method thereof
NIPPON STEEL CORP0 citations49
US12334237B2Jun 17, 2025
Non-oriented electrical steel sheet and method for producing same
NIPPON STEEL CORP0 citations49
NIPPON STEEL & SUMITOMO METAL CORP
5 patentsUS10610964B2Apr 7, 2020
Grain-oriented electrical steel sheet causing low core loss and low magnetostriction
NIPPON STEEL & SUMITOMO METAL CORP3 citations73
US10665372B2May 26, 2020
Electrical steel sheet and manufacturing method thereof
NIPPON STEEL & SUMITOMO METAL CORP4 citations71
US11332831B2May 17, 2022
Insulating coating for electrical steel sheet
NIPPON STEEL & SUMITOMO METAL CORP0 citations60
US10604848B2Mar 31, 2020
Electrical steel sheet
NIPPON STEEL & SUMITOMO METAL CORP0 citations52
US10706998B2Jul 7, 2020
Electrical steel sheet and method for producing electrical steel sheet
NIPPON STEEL & SUMITOMO METAL CORP0 citations51
NITTETSU PLANT DESIGNING CORP
1 patentTAKEDA KAZUTOSHI
1 patentTAKAHASHI FUMIAKI
1 patentShowing the top 50 of 53 patents by PatentIndex Score.