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 Joh Springer S ErbenfiledCriticalJoh Springer S Erben
Application grantedgrantedCritical
Publication of AT179241BpublicationCriticalpatent/AT179241B/de