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 FR7801632Aexternal-prioritypatent/FR2415099A1/en
Application filed by Ile De FrancefiledCriticalIle De France
Priority to AT295283ApriorityCriticalpatent/AT377978B/en
Publication of ATA295283ApublicationCriticalpatent/ATA295283A/en
Application grantedgrantedCritical
Publication of AT377978BpublicationCriticalpatent/AT377978B/en