Seiichi Watanabe

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Amagasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of making steels which are useful in fabricating pressure ve...
- Patent number 4,394,187
- Issue date Jul 19, 1983
- Sumitomo Metal Industries, Ltd.
- Hiroo Ohtani
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Steels which are useful in fabricating pressure vessels
- Patent number 4,375,377
- Issue date Mar 1, 1983
- Sumitomo Metal Industries, Limited
- Hiroo Ohtani
- C21 - METALLURGY OF IRON
Information Patent Grant
Heavy thick high-strength casting having improved weldability and i...
- Patent number 4,344,801
- Issue date Aug 17, 1982
- Sumitomo Metal Industries, Ltd.
- Tatsuro Kunitake
- C21 - METALLURGY OF IRON