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 Norma GmbhfiledCriticalNorma Gmbh
Priority to AT193513DpriorityCriticalpatent/AT193513B/de
Application grantedgrantedCritical
Publication of AT187212BpublicationCriticalpatent/AT187212B/de