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
Priority claimed from AT171023Dexternal-prioritypatent/AT171023B/de
Application filed by Rudolf Dipl Ing Dr Poenninger, Friedrich Ing OestreicherfiledCriticalRudolf Dipl Ing Dr Poenninger
Application grantedgrantedCritical
Publication of AT178712BpublicationCriticalpatent/AT178712B/de
Priority to AT187665DpriorityCriticalpatent/AT187665B/de