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{{PatentInfo |Inventor=John C. Wahl |Assignee=The Wahl Company |Country=US |ApplicationNum=510812 |ApplicationDate=1921-10-27 |PatentNum=1490686 |PatentDate=1924-04-15 |PriorityDate=1921-10-27 |Titolo=Fountain pen |Marca=Eversharp |Descrizione=Levetta ...