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Tamio Ishiyama
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Iruma, JP
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last 30 patents
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Patent Grant
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