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Priority claimed from DE1900118544Dexternal-prioritypatent/DE118544C/de
Priority claimed from DE1900118542Dexternal-prioritypatent/DE118542C/de
Application filed by Alexander Dr ClassenfiledCriticalAlexander Dr Classen
Application grantedgrantedCritical
Publication of AT7275BpublicationCriticalpatent/AT7275B/de