![]() ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by McCarthy Music Corp filed Critical McCarthy Music Corp Priority to US13/973,861 priority Critical patent/US8901405B1/en Priority claimed from CN201480057634.9A external-priority patent/CN105900161A/en Assigned to McCarthy Music Corp. Original Assignee McCarthy Music Corp Priority date (The priority date is an assumption and is not a legal conclusion. ![]() Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) McCarthy Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number US13/973,861 Inventor Kevin M. Google Patents Electronic piano training deviceÄownload PDF Info Publication number US8901405B1 US8901405B1 US13/973,861 US201313973861A US8901405B1 US 8901405 B1 US8901405 B1 US 8901405B1 US 201313973861 A US201313973861 A US 201313973861A US 8901405 B1 US8901405 B1 US 8901405B1 Authority US United States Prior art keywords color training device piano training key keys Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US8901405B1 - Electronic piano training device ![]() US8901405B1 - Electronic piano training device ![]()
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