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Priority to FR873926ApriorityCriticalpatent/FR80449E/fr
Priority to BE615813Aprioritypatent/BE615813A/fr
Priority to CH428762Aprioritypatent/CH380178A/fr
Priority to GB1459962Aprioritypatent/GB940863A/en
Application grantedgrantedCritical
Publication of FR80449EpublicationCriticalpatent/FR80449E/fr