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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Application filed by Petrus Bracke, Jozef Bracke, Eugene De WittefiledCriticalPetrus Bracke
Priority to BE580046ApriorityCriticalpatent/BE580046A/fr
Publication of BE580046ApublicationCriticalpatent/BE580046A/fr