Shigeru Iwase

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Aichi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Silicon nitride based sintered material and method for producing same
- Patent number 5,908,797
- Issue date Jun 1, 1999
- NGK Spark Plug Co., Ltd.
- Kazuhiro Urashima
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES