Shinsaku Koizumi

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Hamamatsu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Action-supporting arrangement in piano
- Patent number 4,821,618
- Issue date Apr 18, 1989
- Kabushiki Kaisha Kawai Gakki Seisakusho
- Shinsaku Koizumi
- G10 - MUSICAL INSTRUMENTS ACOUSTICS