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 DE1901138107Dexternal-prioritypatent/DE138107C/de
Application filed by Wilhelm HelmfiledCriticalWilhelm Helm
Application grantedgrantedCritical
Publication of AT13530BpublicationCriticalpatent/AT13530B/de