Inventor
ITOU KATSUO
JP4 patents
Patents
4 patentsUS6407321B2Jun 18, 2002
Jig for aligning shutter with photo couplers and key and assembling method using the same
YAMAHA CORP18 citations82
US6265647B1Jul 24, 2001
Keyboard musical instrument having hammer stopper changed between free position and blocking position through turn on horizontal plane
YAMAHA CORP12 citations71
US6194649B1Feb 27, 2001
Keyboard musical instrument equipped with partially repaireable change-over mechanism for changing hammer stopper
YAMAHA CORP12 citations71
US6730839B2May 4, 2004
Silent system with split hammer stopper and keyboard musical instrument having the same
YAMAHA CORP10 citations69