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Priority to FR155657ApriorityCriticalpatent/FR7462M/fr
Priority to BE726763Dprioritypatent/BE726763A/xx
Priority to CH40069Aprioritypatent/CH494737A/fr
Priority to DE19691905280prioritypatent/DE1905280A1/de
Priority to NL6901899Aprioritypatent/NL6901899A/xx
Priority to GB1228737Dprioritypatent/GB1228737A/en
Application grantedgrantedCritical
Publication of FR7462MpublicationCriticalpatent/FR7462M/fr