Hiroyuki Matoba

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Ibaragi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Rolling method for parallel-flange steel shapes
- Patent number 4,958,509
- Issue date Sep 25, 1990
- Sumitomo Metal Industries, Ltd.
- Yoshiaki Kusaba
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...