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Priority to FR91872ApriorityCriticalpatent/FR6716M/fr
Priority to GB56832/67Aprioritypatent/GB1200928A/en
Priority to DE19671617483prioritypatent/DE1617483A1/de
Priority to BE709665Dprioritypatent/BE709665A/xx
Application grantedgrantedCritical
Publication of FR6716MpublicationCriticalpatent/FR6716M/fr