Inventor
YOKOI TATSUO
JP41 patents
⚠️ This page may combine multiple inventors who share the name “YOKOI TATSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON STEEL & SUMITOMO METAL CORP
19 patentsUS9863026B2Jan 9, 2018
Dual phase steel sheet and manufacturing method thereof
NIPPON STEEL & SUMITOMO METAL CORP5 citations73
US9797024B2Oct 24, 2017
Hot-rolled steel sheet for gas nitrocarburizing and manufacturing method thereof
NIPPON STEEL & SUMITOMO METAL CORP2 citations73
US10913988B2Feb 9, 2021
Hot-rolled steel sheet
NIPPON STEEL & SUMITOMO METAL CORP2 citations72
US10329637B2Jun 25, 2019
Heat-rolled steel plate for tailored rolled blank, tailored rolled blank, and methods for producing these
NIPPON STEEL & SUMITOMO METAL CORP2 citations72
US10260124B2Apr 16, 2019
Hot-rolled steel sheet and manufacturing method thereof
NIPPON STEEL & SUMITOMO METAL CORP3 citations72
US10196726B2Feb 5, 2019
High-strength hot-rolled steel sheet having excellent baking hardenability and low temperature toughness with maximum tensile strength of 980 MPa or more
NIPPON STEEL & SUMITOMO METAL CORP2 citations72
US9903023B2Feb 27, 2018
Hot rolled steel sheet and method for manufacturing the same
NIPPON STEEL & SUMITOMO METAL CORP2 citations71
US10087499B2Oct 2, 2018
Hot-rolled steel sheet and manufacturing method thereof
NIPPON STEEL & SUMITOMO METAL CORP5 citations70
US10689737B2Jun 23, 2020
Hot-rolled steel sheet
NIPPON STEEL & SUMITOMO METAL CORP1 citations62
US10590506B2Mar 17, 2020
Hot-rolled steel sheet for tailored rolled blank and tailored rolled blank
NIPPON STEEL & SUMITOMO METAL CORP1 citations62
US11208702B2Dec 28, 2021
Hot-rolled steel sheet and manufacturing method thereof
NIPPON STEEL & SUMITOMO METAL CORP1 citations61
US10364478B2Jul 30, 2019
Bainite-containing-type high-strength hot-rolled steel sheet having excellent isotropic workability and manufacturing method thereof
NIPPON STEEL & SUMITOMO METAL CORP0 citations52
US9657364B2May 23, 2017
High strength hot rolled steel sheet for line pipe use excellent in low temperature toughness and ductile fracture arrest performance and method of production of same
NIPPON STEEL & SUMITOMO METAL CORP1 citations52
US11401571B2Aug 2, 2022
Hot-rolled steel sheet
NIPPON STEEL & SUMITOMO METAL CORP0 citations51
US10752972B2Aug 25, 2020
Hot-rolled steel sheet
NIPPON STEEL & SUMITOMO METAL CORP0 citations41
US10226800B2Mar 12, 2019
Hot-rolled steel sheet
NIPPON STEEL & SUMITOMO METAL CORP0 citations41
US9896737B2Feb 20, 2018
Hot-rolled steel sheet
NIPPON STEEL & SUMITOMO METAL CORP0 citations41
US10689724B2Jun 23, 2020
Steel sheet with strain induced transformation type composite structure and method of manufacturing same
NIPPON STEEL & SUMITOMO METAL CORP0 citations40
US10384256B2Aug 20, 2019
Tooling for punching steel sheet and punching method
NIPPON STEEL & SUMITOMO METAL CORP0 citations36
NIPPON STEEL CORP
14 patentsUS7381478B2Jun 3, 2008
Hot rolled steel sheet for processing and method for manufacturing the same
NIPPON STEEL CORP22 citations92
US6589369B2Jul 8, 2003
High fatigue strength steel sheet excellent in burring workability and method for producing the same
NIPPON STEEL CORP44 citations92
US7662243B2Feb 16, 2010
Hot rolled steel sheet
NIPPON STEEL CORP9 citations84
US5855696AJan 5, 1999
Ultra low carbon, cold rolled steel sheet and galvanized steel sheet having improved fatigue properties and processes for producing the same
NIPPON STEEL CORP17 citations82
US7749338B2Jul 6, 2010
High burring, high strength steel sheet excellent in softening resistance of weld heat affected zone and method of production of same
NIPPON STEEL CORP16 citations80
US11492679B2Nov 8, 2022
Hot-rolled steel sheet and method for manufacturing same
NIPPON STEEL CORP4 citations71
US12448660B2Oct 21, 2025
Hot-rolled steel sheet and method for manufacturing same
NIPPON STEEL CORP0 citations61
US7503984B2Mar 17, 2009
High-strength thin steel sheet drawable and excellent in shape fixation property and method of producing the same
NIPPON STEEL CORP5 citations61
US12442062B2Oct 14, 2025
Hot-rolled steel sheet
NIPPON STEEL CORP0 citations51
US12421567B2Sep 23, 2025
High-strength hot-rolled steel sheet
NIPPON STEEL CORP0 citations51
US11028458B2Jun 8, 2021
Steel sheet and plated steel sheet
NIPPON STEEL CORP0 citations51
US12428694B2Sep 30, 2025
Hot-rolled steel sheet and method for manufacturing same
NIPPON STEEL CORP0 citations49
US10900100B2Jan 26, 2021
Hot rolled steel sheet
NIPPON STEEL CORP0 citations49
US10894996B2Jan 19, 2021
Hot rolled steel sheet
NIPPON STEEL CORP0 citations49
YOKOI TATSUO
7 patentsUS9752217B2Sep 5, 2017
Hot-rolled steel sheet and method of producing the same
YOKOI TATSUO3 citations72
US9062356B2Jun 23, 2015
High strength hot rolled steel plate for spiral line pipe superior in low temperature toughness and method of production of same
YOKOI TATSUO4 citations72
US9453269B2Sep 27, 2016
Hot-rolled steel sheet for gas nitrocarburizing and manufacturing method thereof
YOKOI TATSUO2 citations62
US8562762B2Oct 22, 2013
High strength hot rolled steel products for line-pipes excellent in low temperature toughness and production method of the same
YOKOI TATSUO2 citations62
US9587287B2Mar 7, 2017
Bainite-containing-type high-strength hot-rolled steel sheet having excellent isotropic workability and manufacturing method thereof
YOKOI TATSUO0 citations51
US9200342B2Dec 1, 2015
Hot-rolled steel sheet and manufacturing method thereof
YOKOI TATSUO1 citations50
US8157933B2Apr 17, 2012
High-strength hot rolled steel sheet being free from peeling and excellent in surface properties and burring properties, and method for manufacturing the same
YOKOI TATSUO0 citations49