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 Marx Erwin Prof Ing Dr, Buchwald Herbert Ing Dr, Krahl Gottfried Ing DiplfiledCriticalMarx Erwin Prof Ing Dr
Publication of CH175452ApublicationCriticalpatent/CH175452A/de