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 as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delle Atel Const ElectrfiledCriticalDelle Atel Const Electr
Publication of CH280302ApublicationCriticalpatent/CH280302A/en
Device for maintaining the synchronism of several phenomena occurring simultaneously, in particular of several inscriptions of manetic sounds occurring simultaneously