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 DE1907201810Dexternal-prioritypatent/DE201810C/de
Application filed by Johannes MittendorffiledCriticalJohannes Mittendorf
Application grantedgrantedCritical
Publication of AT38946BpublicationCriticalpatent/AT38946B/en