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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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Publication date
Priority claimed from CH6459158Aexternal-prioritypatent/CH371458A/de
Priority claimed from FR805989Aexternal-prioritypatent/FR1280575A/fr
Application filedfiledCritical
Priority to FR834387ApriorityCriticalpatent/FR78M/fr
Application grantedgrantedCritical
Publication of FR78MpublicationCriticalpatent/FR78M/fr
