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 Telephon Apparat Fabrik PetschfiledCriticalTelephon Apparat Fabrik Petsch
Priority to AT12112DpriorityCriticalpatent/AT12112B/de
Application grantedgrantedCritical
Publication of AT12112BpublicationCriticalpatent/AT12112B/de
