Kazuo Tsumura

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing a tube of ultra-high strength steel having rema...
- Patent number 4,102,711
- Issue date Jul 25, 1978
- Sumitomo Metal Industries, Ltd.
- Tatsuro Kunitake
- C21 - METALLURGY OF IRON