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{{PatentInfo |Inventor=Robert Back |Assignee=The Wahl Company |Country=US |ApplicationNum=653017 |ApplicationDate=1933-01-23 |PatentNum=1980159 |PatentDate=1934-11-06 |PriorityDate=1933-01-23 |Titolo=Writing implement |Marca=Eversharp |Descrizione=Penn...