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 Friedrich Hoene, Heinz GruberfiledCriticalFriedrich Hoene
Priority to DD19680377ApriorityCriticalpatent/DD132241B1/de
Publication of DD132241A1publicationCriticalpatent/DD132241A1/de
Publication of DD132241B1publicationCriticalpatent/DD132241B1/de