Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US479822A Inventor Soprani Paolo Settimio Original Assignee Soprani Paolo Settimio Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Electronic accordion with hinged keyboard and contact plateĭownload PDF Info Publication number US3419668A US3419668A US479822A US47982265A US3419668A US 3419668 A US3419668 A US 3419668A US 479822 A US479822 A US 479822A US 47982265 A US47982265 A US 47982265A US 3419668 A US3419668 A US 3419668A Authority US United States Prior art keywords accordion contact plate keyboard plate bellows Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Google Patents US3419668A - Electronic accordion with hinged keyboard and contact plate US3419668A - Electronic accordion with hinged keyboard and contact plate
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