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Priority claimed from US501532Aexternal-prioritypatent/US2872009A/en
Priority claimed from AU17305/56Aexternal-prioritypatent/AU209710B2/en
Application filed by Nat VendorsfiledCriticalNat Vendors
Application grantedgrantedCritical
Publication of BE595913QpublicationCriticalpatent/BE595913Q/fr