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Hak Sik JOO
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Seoul, KR
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last 30 patents
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Patent Grant
Fused sheet for electromagnetic wave absorption-extinction and shie...
Patent number
11,052,636
Issue date
Jul 6, 2021
Hak Sik Joo
B22 - CASTING POWDER METALLURGY
Patents Applications
last 30 patents
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Patent Application
FUSED SHEET FOR ELECTROMAGNETIC WAVE ABSORPTION-EXTINCTION AND SHIE...
Publication number
20180162098
Publication date
Jun 14, 2018
Hak Sik JOO
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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Patent Application
METHOD FOR MANUFACTURING OPEN CELL MICROPOROUS METAL
Publication number
20080118385
Publication date
May 22, 2008
Hak Sik JOO
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...