Hae-Chang Choi

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Patents Grantslast 30 patents

Information Patent Grant
Method for manufacturing steel plate having superior toughness in w...
- Patent number 7,396,423
- Issue date Jul 8, 2008
- Posco
- Hong-Chul Jeong
- C21 - METALLURGY OF IRON
Information Patent Grant
Steel plate having superior toughness in weld heat-affected zone an...
- Patent number 7,105,066
- Issue date Sep 12, 2006
- Posco
- Hong-Chul Jeong
- C21 - METALLURGY OF IRON
Information Patent Grant
Steel plate having TiN+ZrN precipitates for welded structures, meth...
- Patent number 6,966,955
- Issue date Nov 22, 2005
- Posco
- Hae-Chang Choi
- C21 - METALLURGY OF IRON
Information Patent Grant
Steel plate having Tin+MnS precipitates for welded structures, meth...
- Patent number 6,946,038
- Issue date Sep 20, 2005
- Posco
- Hong-Chul Jeong
- C21 - METALLURGY OF IRON
Information Patent Grant
Steel plate having TiN+CuS precipitates for welded structur...
- Patent number 6,686,061
- Issue date Feb 3, 2004
- Posco
- Hong-Chul Jeong
- C21 - METALLURGY OF IRON

Patents Applicationslast 30 patents

Information Patent Application
Method for manufacturing steel plate having superior toughness in w...
- Publication number 20050173030
- Publication date Aug 11, 2005
- STRAPACK CORPORATION
- Hong-Chul Jeong
- C21 - METALLURGY OF IRON
Information Patent Application
Steel plate having superior toughness in weld heat-affected zone an...
- Publication number 20040144454
- Publication date Jul 29, 2004
- Hong-Chul Jeong
- C21 - METALLURGY OF IRON
Information Patent Application
Steel plate to be precipitating tinfor weleded structures, method f...
- Publication number 20030131914
- Publication date Jul 17, 2003
- Hong-Chul Jeong
- C21 - METALLURGY OF IRON
Information Patent Application
Steel plate to be precipitating tinfor welded structures,method for...
- Publication number 20030121577
- Publication date Jul 3, 2003
- Hae-Chang Choi
- C21 - METALLURGY OF IRON
Information Patent Application
Steel plate to be precipitating tinfor welded structures, method fo...
- Publication number 20030106623
- Publication date Jun 12, 2003
- Hong-Chul Jeong
- C21 - METALLURGY OF IRON