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 CH1305567Aexternal-prioritypatent/CH470771A/de
Application filedfiledCritical
Publication of HU167299BpublicationCriticalpatent/HU167299B/hu