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 DE1904159903Dexternal-prioritypatent/DE159903C/de
Application filed by Wilhelm AhrensfiledCriticalWilhelm Ahrens
Application grantedgrantedCritical
Publication of AT25551BpublicationCriticalpatent/AT25551B/en