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Priority claimed from DEN33430Dexternal-prioritypatent/DE628013C/de
Application filed by Philips NvfiledCriticalPhilips Nv
Priority to NL63069ApriorityCriticalpatent/NL36237C/nl
Priority to DEN34486Dprioritypatent/DE636696C/de
Application grantedgrantedCritical
Publication of NL36237CpublicationCriticalpatent/NL36237C/nl