Kazuumi Harashima

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Patents Grantslast 30 patents

Information Patent Grant
Method of refining molten metal or molten alloy
- Patent number 5,454,854
- Issue date Oct 3, 1995
- Nippon Steel Corporation
- Kazuumi Harashima
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of dephosphorization of metal or alloy
- Patent number 4,198,229
- Issue date Apr 15, 1980
- Nippon Steel Corporation
- Hiroyuki Katayama
- C21 - METALLURGY OF IRON