Ryousei Kawa-ai

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Kodaira, JP

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Patents Grantslast 30 patents

Information Patent Grant
Polishing method and apparatus
- Patent number 6,478,977
- Issue date Nov 12, 2002
- Hitachi, Ltd.
- Shigeo Moriyama
- B24 - GRINDING POLISHING
Information Patent Grant
Polishing method and apparatus
- Patent number 6,180,020
- Issue date Jan 30, 2001
- Hitachi, Ltd.
- Shigeo Moriyama
- B24 - GRINDING POLISHING