Kenji Betsuki

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Kitakyushu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Rolling method and apparatus for forming sections having flange
- Patent number 4,685,319
- Issue date Aug 11, 1987
- Nippon Steel Corporation
- Koshiro Aoyagi
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...