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 DE2207576Aexternal-prioritypatent/DE2207576C2/de
Application filedfiledCritical
Publication of HU166063BpublicationCriticalpatent/HU166063B/hu