Inventor
IZUTANI HITOSHI
CN4 patents
Patents
4 patentsUS7345235B2Mar 18, 2008
Keyboard musical instrument having keys equipped with balancers biting into keys and method for securing balancers to keys
YAMAHA CORP18 citations91
US7999162B2Aug 16, 2011
Movable part firmly equipped with balance weight, musical instrument and method of assembling balance weight therein
YAMAHA CORP10 citations82
US7807911B2Oct 5, 2010
Keyboard musical instrument having keys equipped with balancers biting into keys and method for securing balancers to keys
YAMAHA CORP8 citations82
US10424275B2Sep 24, 2019
Upright piano
YAMAHA CORP0 citations45