Seiji Nagai

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Okayama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for building unburned refractory
- Patent number 6,284,045
- Issue date Sep 4, 2001
- Shinagawa Refractories Co., Ltd.
- Ryosuke Nakamura
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Apparatus for mixing and pumping slurry
- Patent number 4,695,167
- Issue date Sep 22, 1987
- Shinagawa Refractories Co., Ltd.
- Masashi Mori
- B28 - WORKING CEMENT, CLAY, OR STONE