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 DE1729929Aexternal-prioritypatent/DE1729929C2/de
Application filed by Wilhelm HachtelfiledCriticalWilhelm Hachtel
Publication of NO131155BpublicationCriticalpatent/NO131155B/no
Publication of NO131155CpublicationCriticalpatent/NO131155C/no