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Priority claimed from GB30247/69Aexternal-prioritypatent/GB1261455A/en
Priority claimed from CS152770Aexternal-prioritypatent/CS194152B2/en
Application filed by Gresswell Ronald M, John W Mentha, Russell SeamanfiledCriticalGresswell Ronald M
Priority to CS768032ApriorityCriticalpatent/CS194183B2/en
Publication of CS194183B2publicationCriticalpatent/CS194183B2/en