Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Individual
Original Assignee
Individual
Publication of AU492363B2publicationCriticalpatent/AU492363B2/en
Priority claimed from US00329585Aexternal-prioritypatent/US3812967A/en
Application filed by IndividualfiledCriticalIndividual
Publication of AU6508474ApublicationCriticalpatent/AU6508474A/en
Keyboard instrument selectively entering into an acoustic sound mode and an electronic sound mode through a rotation of a stopper with a cushion sheet against damper wires