Toshiaki Kawata

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing refractory metal or alloy materials
- Patent number 5,224,534
- Issue date Jul 6, 1993
- Nippon Mining and Metals Company, Limited
- Fumiyuki Shimizu
- B22 - CASTING POWDER METALLURGY