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Priority to NL7104614ApriorityCriticalpatent/NL7104614A/xx
Priority to GB1503872Aprioritypatent/GB1375261A/en
Priority to IT2271372Aprioritypatent/IT953591B/it
Priority to BE781692Aprioritypatent/BE781692A/xx
Priority to DE19722216332prioritypatent/DE2216332A1/de
Priority to FR7212168Aprioritypatent/FR2132486A1/fr
Publication of NL7104614ApublicationCriticalpatent/NL7104614A/xx