Inventor
LEE HAK-CHEOL
KR14 patents
⚠️ This page may combine multiple inventors who share the name “LEE HAK-CHEOL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
POSCO
11 patentsUS11634784B2Apr 25, 2023
Ultra-thick steel material having excellent surface part NRL-DWT properties and method for manufacturing same
POSCO0 citations61
US12480171B2Nov 25, 2025
Ultra-thick structural steel having excellent brittle crack initiation resistance, and manufacturing method therefor
POSCO0 citations60
US11608549B2Mar 21, 2023
Cryogenic steel plate and method for manufacturing same
POSCO0 citations60
US11591679B2Feb 28, 2023
Low-temperature steel material having excellent toughness in welding portion thereof and manufacturing method therefor
POSCO0 citations60
US11434557B2Sep 6, 2022
Low-temperature steel plate having excellent impact toughness, and method for manufacturing same
POSCO0 citations60
US11649518B2May 16, 2023
Ultra-thick steel material having excellent surface part NRL-DWT properties and method for manufacturing same
POSCO0 citations50
US10883159B2Jan 5, 2021
High-strength steel having superior brittle crack arrestability, and production method therefor
POSCO0 citations50
US10301707B2May 28, 2019
Steel having excellent weldability and impact toughness of welding zone
POSCO0 citations50
US12338515B2Jun 24, 2025
Ultra-thick steel excellent in brittle crack arrestability and manufacturing method therefor
POSCO0 citations49
US10041156B2Aug 7, 2018
High strength austenitic-based steel with remarkable toughness of welding heat-affected zone and preparation method therefor
POSCO1 citations49
US10822671B2Nov 3, 2020
High-strength steel having superior brittle crack arrestability, and production method therefor
POSCO0 citations40