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|Assignee=Eugen Hahn, August Eberstein
|Assignee=Eugen Hahn, August Eberstein
|Country=GB
|Country=GB
|ApplicationNum=379615
|ApplicationNum=190713900
|ApplicationDate=1907-06-15
|ApplicationDate=1907-06-15
|PatentNum=13900
|PatentNum=190713900
|PatentDate=1908-03-12
|PatentDate=1908-03-12
|PriorityDate=1907-06-15
|PriorityDate=1907-06-15