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Priority claimed from US10800Aexternal-prioritypatent/US2601476A/en
Priority claimed from GB1818948Aexternal-prioritypatent/GB642493A/en
Application filed by Alumin Building Components Ltd, Edward John MillsfiledCriticalAlumin Building Components Ltd
Application grantedgrantedCritical
Publication of BE585725QpublicationCriticalpatent/BE585725Q/en