Soyoko Ando

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Microwave dielectric ceramic composition
- Patent number 6,331,499
- Issue date Dec 18, 2001
- Sumitomo Special Metals Co., Ltd.
- Takeshi Shimada
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES