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Priority claimed from US00178079Aexternal-prioritypatent/US3811916A/en
Priority claimed from US00180276Aexternal-prioritypatent/US3786135A/en
Application filed by Aluminium Company Of AmericafiledCriticalAluminium Company Of America
Publication of IS2101A7publicationCriticalpatent/IS2101A7/en
Publication of IS992B6publicationCriticalpatent/IS992B6/en