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Publication date
Application filed by South African InventionsfiledCriticalSouth African Inventions
Priority to ZA696841*ApriorityCriticalpatent/ZA696841B/en
Priority to US00075146Aprioritypatent/US3810576A/en
Priority to DE2047704Aprioritypatent/DE2047704B2/en
Priority to DE7035901Uprioritypatent/DE7035901U/en
Publication of ZA696841BpublicationCriticalpatent/ZA696841B/en