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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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Priority claimed from FR1061Aexternal-prioritypatent/FR1322128A/fr
Application filedfiledCritical
Priority to FR881228ApriorityCriticalpatent/FR80866E/fr
Priority to GB1236762Aprioritypatent/GB942109A/en
Application grantedgrantedCritical
Publication of FR80866EpublicationCriticalpatent/FR80866E/fr