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
Priority claimed from DE1901133387Dexternal-prioritypatent/DE133387C/de
Application filed by Telephon Apparat Fabrik PetschfiledCriticalTelephon Apparat Fabrik Petsch
Application grantedgrantedCritical
Publication of AT13130BpublicationCriticalpatent/AT13130B/de