Shigeyuki Yasuyama

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Microwave dielectric ceramic composition
- Patent number 5,188,993
- Issue date Feb 23, 1993
- Sanyo Electric Co., Ltd.
- Hisakazu Takahashi
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES