Inventor · disambiguated record
Jai-Hyun Kwak
Also filed as: KWAK JAI-HYUN
15 granted patents·3 pending applications·27 citations·filing 2008–2019
88Inventor score
Top patents by PatentIndex Score
18 records- 0187US8778097B2Low specific gravity and high strength steel sheets with excellent ridging resistibility and manufacturing methods thereofCHIN KWANG GEUN·Filed 2008·Granted Jul 15, 2014·8 cites·15 claims
- 0284US9738958B2Austenitic, lightweight, high-strength steel sheet having high yield ratio and ductility, and method for producing the sameCHIN KWANG-GEUN·Filed 2011·Granted Aug 22, 2017·3 cites·11 claims
- 0383US9109273B2High strength steel sheet and hot dip galvanized steel sheet having high ductility and excellent delayed fracture resistance and method for manufacturing the sameJIN YOUNG HOON·Filed 2008·Granted Aug 18, 2015·8 cites·9 claims
- 0482US10358691B2Apparatus for continuous annealing of strip and method for continuous annealing of samePOSCO·Filed 2014·Granted Jul 23, 2019·2 cites·2 claims
- 0581US9598753B2High strength thin steel sheet for the superior press formability and surface quality and galvanized steel sheet and method for manufacturing the samePOSCO·Filed 2015·Granted Mar 21, 2017·1 cites·4 claims
- 0677US11753693B2High-strength cold rolled steel sheet having high hole expansion ratio, highstrength hot-dip galvanized steel sheet, and manufacturing methods thereforPOSCO·Filed 2019·Granted Sep 12, 2023·0 cites·5 claims
- 0777US10604820B2Method of continuously annealing a stripPOSCO·Filed 2019·Granted Mar 31, 2020·0 cites·5 claims
- 0876US8741078B2Method for manufacturing an ultrahigh strength hot dip galvanized steel sheet having martensitic structure as matrixSONG TAE-JIN·Filed 2009·Granted Jun 3, 2014·5 cites·6 claims
- 0963US12180571B2High-strength cold rolled steel sheet and galvannealed steel sheet having excellent burring property, and manufacturing method thereforPOSCO·Filed 2019·Granted Dec 31, 2024·0 cites·20 claims
- 1059US12194560B2Method for preventing spot welding crack of galvanized steel platePOSCO·Filed 2018·Granted Jan 14, 2025·0 cites·7 claims
- 1157US9856542B2Ferritic lightweight high-strength steel sheet having excellent stiffness and ductility, and method of manufacturing the samePOSCO·Filed 2012·Granted Jan 2, 2018·0 cites·12 claims
- 1256US2011064968A1High-Strength Steel Sheet with Excellent Ductility and Crackless Edge Portion, Hot-Dip Galvanized Steel Sheet, and Manufacturing Method ThereofPOSCO·Filed 2009·Application pending·0 cites
- 1355US9194030B2High strength thin steel sheet for the superior press formability and surface quality and galvanized steel sheet and method for manufacturing the sameKWAK JAI HYUN·Filed 2008·Granted Nov 24, 2015·0 cites·5 claims
- 1450US10273556B2Lightweight steel sheet having excellent strength and ductility and method for manufacturing samePOSCO·Filed 2013·Granted Apr 30, 2019·0 cites·7 claims
- 1549US11091818B2High strength cold-rolled steel sheet and hot-dip galvanized steel sheet having excellent hole expansion, ductility and surface treatment properties, and method for manufacturing samePOSCO·Filed 2016·Granted Aug 17, 2021·0 cites·7 claims
- 1646US10519526B2High-strength cold rolled steel sheet having excellent ductility, hot-dip galvanized steel sheet and method for manufacturing samePOSCO·Filed 2015·Granted Dec 31, 2019·0 cites·11 claims
- 1745US2020190612A1High strength cold-rolled steel sheet having excellent yield strength, ductility, and hole expandability, hot-dip galvanized steel sheet, and method for producing samePOSCO·Filed 2017·Application pending·0 cites
- 1843US2013295402A1Steel Sheet for Formed Member Having Enhanced Ductility, Formed Member, and Method for Manufacturing the Formed MemberOH JIN-KEUN·Filed 2011·Application pending·0 cites
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