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.)
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Publication date
Application filed by Siegfried BerndtfiledCriticalSiegfried Berndt
Priority to DD20169477ApriorityCriticalpatent/DD133735A1/de
Priority to FR7828143Aprioritypatent/FR2407590A1/fr
Priority to DE19787829830prioritypatent/DE7829830U1/de
Priority to DE19782843628prioritypatent/DE2843628A1/de
Publication of DD133735A1publicationCriticalpatent/DD133735A1/de