Hanji Oba

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Sakai, JP

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Patents Grantslast 30 patents

Information Patent Grant
Machine for direct rolling of steel casting and producing steel pro...
- Patent number 4,658,882
- Issue date Apr 21, 1987
- Nippon Steel Corporation
- Hanji Oba
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...