Kunio Koyama

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Futtsu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Super-high-strength line pipe excellent in low temperature toughnes...
- Patent number 6,532,995
- Issue date Mar 18, 2003
- Nippon Steel Corporation
- Hitoshi Asahi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...