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 DE19681668884external-prioritypatent/DE1668884A1/de
Application filedfiledCritical
Publication of RO57178A7publicationCriticalpatent/RO57178A7/ro