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Hajime Hayashida
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Hamamatsu, JP
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last 30 patents
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Patent Grant
Keyboard musical instrument equipped with hammer shank stopper wher...
Patent number
5,616,880
Issue date
Apr 1, 1997
Yamaha Corporation
Hajime Hayashida
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Keyboard musical instrument having jacks changeable in escape speed...
Patent number
5,583,306
Issue date
Dec 10, 1996
Yamaha Corporation
Hajime Hayashida
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Keyboard musical instrument having variable contact point between j...
Patent number
5,557,052
Issue date
Sep 17, 1996
Yamaha Corporation
Hajime Hayashida
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Upright piano with key action mechanism responsive to repetition wi...
Patent number
5,353,671
Issue date
Oct 11, 1994
Yamaha Corporation
Satoshi Inoue
G10 - MUSICAL INSTRUMENTS ACOUSTICS
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
Sound board assembly for musical instruments
Patent number
5,170,000
Issue date
Dec 8, 1992
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
Key-driving/detecting mechanism for keyboard instrument
Patent number
4,524,669
Issue date
Jun 25, 1985
Nippon Gakki Seizo Kabushiki Kaisha
Jun Yamamoto
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Piano hammer
Patent number
4,135,430
Issue date
Jan 23, 1979
Nippon Gakki Seizo Kabushiki Kaisha
Hajime Hayashida
G10 - MUSICAL INSTRUMENTS ACOUSTICS