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Masafumi Okamoto
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Himeji, JP
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last 30 patents
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Patent Grant
Process for producing non-directional electrical steel sheets free...
Patent number
4,331,196
Issue date
May 25, 1982
Nippon Steel Corporation
Tetsuro Ohashi
B22 - CASTING POWDER METALLURGY
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Patent Grant
Method for preventing the edge crack in a grain oriented silicon st...
Patent number
4,204,891
Issue date
May 27, 1980
Nippon Steel Corporation
Morio Shiozaki
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...