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Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from DET53436Dexternal-prioritypatent/DE764598C/de
Application filed by Troponwerke Dinklage & CofiledCriticalTroponwerke Dinklage & Co
Publication of BE440626ApublicationCriticalpatent/BE440626A/fr