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{{PatentInfo |Inventor=Hendrik Karel Domenicus van den Bussche |Assignee=Hendrik Karel Domenicus van den Bussche |Country=FR |ApplicationNum=1047934 |ApplicationDate=1950-08-03 |PatentNum=1047934 |PatentDate=1953-12-17 |PriorityDate=1950-08-03 |Titolo=...