Kouichi Yasuda

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Yokohama, JP

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Patents Grantslast 30 patents

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Molded articles formed of silicon nitride based ceramic and process...
- Patent number 5,145,812
- Issue date Sep 8, 1992
- Toa Nenryo Kogyo Kabushiki Kaisha
- Mikiro Arai
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES