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 Egon Franke, Peter ApelfiledCriticalEgon Franke
Priority to DD20856578ApriorityCriticalpatent/DD139352A1/en
Priority to DE19792906818prioritypatent/DE2906818A1/en
Priority to CH391479Aprioritypatent/CH637345A5/en
Priority to FR7910662Aprioritypatent/FR2424854A1/en
Priority to GB7915057Aprioritypatent/GB2020255B/en
Priority to IT3581079Uprioritypatent/IT7935810V0/en
Priority to ES1979243021Uprioritypatent/ES243021Y/en
Publication of DD139352A1publicationCriticalpatent/DD139352A1/en