Akihiko Igawa

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Kami, JP

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Patents Grantslast 30 patents

Information Patent Grant
Positive temperature coefficient semiconductor ceramic
- Patent number 4,956,320
- Issue date Sep 11, 1990
- Kurabe Industrial Co., Ltd.
- Masahiro Asakura
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES