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Priority claimed from DEM43227Aexternal-prioritypatent/DE1216473B/en
Priority claimed from DEM43228Aexternal-prioritypatent/DE1162504B/en
Application filed by Michaelis Industrieofenbau K GfiledCriticalMichaelis Industrieofenbau K G
Publication of BE596517ApublicationCriticalpatent/BE596517A/en