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Won Shin Kwak
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Ulsan, KR
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last 30 patents
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Patent Grant
Copper alloy strip having high heat resistance and thermal dissipat...
Patent number
11,697,864
Issue date
Jul 11, 2023
POONGSAN CORPORATION
Won Shin Kwak
C21 - METALLURGY OF IRON
Information
Patent Grant
Free-cutting leadless copper alloy with no lead and bismuth
Patent number
11,692,243
Issue date
Jul 4, 2023
POONGSAN CORPORATION
Bo Min Jeon
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Patents Applications
last 30 patents
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Patent Application
COPPER ALLOY STRIP HAVING HIGH HEAT RESISTANCE AND THERMAL DISSIPAT...
Publication number
20210363611
Publication date
Nov 25, 2021
POONGSAN CORPORATION
Won Shin Kwak
C21 - METALLURGY OF IRON
Information
Patent Application
FREE-CUTTING LEADLESS COPPER ALLOY WITH NO LEAD AND BISMUTH
Publication number
20210363613
Publication date
Nov 25, 2021
POONGSAN CORPORATION
BO MIN JEON
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
COPPER ALLOY FOR ELECTRICAL AND ELECTRONIC PARTS AND SEMICONDUCTORS...
Publication number
20210332459
Publication date
Oct 28, 2021
POONGSAN CORPORATION
Won Shin Kwak
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...