Toshiaki Sakai

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Shizuoka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Muting device of upright piano
- Patent number 5,196,638
- Issue date Mar 23, 1993
- Yamaha Corporation
- Hajime Hayashida
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Mechanical keyboard instrument with pedal mechanisms
- Patent number 4,924,742
- Issue date May 15, 1990
- Yamaha Corporation
- Motoichi Numata
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Bearing bush for center pins on a piano action
- Patent number 4,673,515
- Issue date Jun 16, 1987
- Nippon Gakki Seizo Kabushiki Kaisha
- Toshiaki Sakai
- G10 - MUSICAL INSTRUMENTS ACOUSTICS