Tokio Ohkoshi

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sintered aluminum nitride semi-conductor device
- Patent number 4,585,706
- Issue date Apr 29, 1986
- Hitachi, Ltd.
- Yukio Takeda
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Semiconductor device having electrically insulating substrate of SiC
- Patent number 4,571,610
- Issue date Feb 18, 1986
- Hitachi, Ltd.
- Yasuo Matsushita
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Sintered aluminum nitride and semi-conductor device using the same
- Patent number 4,540,673
- Issue date Sep 10, 1985
- Hitachi, Ltd.
- Yukio Takeda
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES