Hajimu Choba

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Fujisawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Stainless steel pipe of bright annealing finish type, having highly...
- Patent number 6,029,714
- Issue date Feb 29, 2000
- Sumitomo Metal Industries, Ltd.
- Yoichi Imamura
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...