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
Priority claimed from AT178712Dexternal-prioritypatent/AT178712B/en
Application filed by Rudolf Dipl Ing Dr Poenninger, Friedrich Ing OestreicherfiledCriticalRudolf Dipl Ing Dr Poenninger
Application grantedgrantedCritical
Publication of AT187665BpublicationCriticalpatent/AT187665B/en