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
Application filed by Escher S Spinnerei Und ZwirnerfiledCriticalEscher S Spinnerei Und Zwirner
Publication of CH6412ApublicationCriticalpatent/CH6412A/de