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{{PatentInfo |Inventor=Raymond T. Bell |Assignee=The Wahl Company |Country=US |ApplicationNum=458445 |ApplicationDate=1921-04-04 |PatentNum=1510618 |PatentDate=1924-10-07 |PriorityDate=1921-04-04 |Titolo=Pencil |Marca=Eversharp |Descrizione=Matita mecc...