Joung Yul Lee

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Kwangyang, KR

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Patents Grantslast 30 patents

Information Patent Grant
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- Patent number 6,346,212
- Issue date Feb 12, 2002
- Pohang Iron & Steel Co., Ltd.
- Sung-Mo Seo
- C21 - METALLURGY OF IRON
Information Patent Grant
Tap hole drilling machine for blast furnace, drill bit for use in t...
- Patent number 6,086,816
- Issue date Jul 11, 2000
- Pohang Iron & Steel Co., Ltd.
- Joung Yul Lee
- C21 - METALLURGY OF IRON