Seok-Ryul Yun

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Ansan-shi, KR

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Patents Grantslast 30 patents

Information Patent Grant
Structure of intermediate wall of three arch excavated tunnel and m...
- Patent number 7,530,765
- Issue date May 12, 2009
- Dong-Hyung Seo
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Structure of intermediate wall of three arch excavated tunnel and m...
- Publication number 20060165489
- Publication date Jul 27, 2006
- Dong-Hyun SEO
- Dong-Hyun Seo
- E21 - EARTH DRILLING MINING