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 Kamera & Kinowerke Dresden VebfiledCriticalKamera & Kinowerke Dresden Veb
Application grantedgrantedCritical
Publication of AT223939BpublicationCriticalpatent/AT223939B/en