Inventor
TOYAMA YUTAKA
JP4 patents
Patents
4 patentsUS6980432B2Dec 27, 2005
Electronic apparatus
YAMAHA CORP5 citations60
US7544876B2Jun 9, 2009
Keyboard apparatus of electronic keyboard instrument
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US7476795B2Jan 13, 2009
Keyboard device for electronic musical keyboard instrument
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US7678981B2Mar 16, 2010
Keyboard structure of electronic keyboard instrument
YAMAHA CORP1 citations47