Tomohiro Okumura

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Tajimi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Refractory for gas blowing for molten metal refining vessel
- Patent number 5,265,850
- Issue date Nov 30, 1993
- Tokyo Yogyo Kabushiki Kaisha
- Keizo Aramaki
- B22 - CASTING POWDER METALLURGY