Jai-hyun Kwak

3 Patents

• US121945602025

  Method for Preventing Spot Welding Crack of Galvanized Steel Plate

  POSCO CO., Ltd

  0 cites
• US121805712024

  High-strength Cold Rolled Steel Sheet and Galvannealed Steel Sheet Having Excellent Burring Property, and Manufacturing Method Therefor

  POSCO CO., Ltd

  0 cites
• US117536932023

  High-strength Cold Rolled Steel Sheet Having High Hole Expansion Ratio, Highstrength Hot-dip Galvanized Steel Sheet, and Manufacturing Methods Therefor

  POSCO CO., Ltd

  0 cites