Inventor
MATSUBA MASAAKI
JP3 patents
Patents
3 patentsUS11423868B2Aug 23, 2022
Keyboard device and musical sound emission method
ROLAND CORP0 citations55
US11252502B2Feb 15, 2022
Sound emitting device, electronic keyboard musical instrument and sound emitting method
ROLAND CORP1 citations55
US11146872B2Oct 12, 2021
Electronic keyboard instrument and sound releasing method thereof
ROLAND CORP1 citations53