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{{PatentInfo |Inventor=Paul E. Wirt |Assignee=Paul E. Wirt |Country=US |ApplicationNum=103042 |ApplicationDate=1902-04-15 |PatentNum=723113 |PatentDate=1903-03-17 |PriorityDate=1902-04-15 |Titolo=Fountain-pen |Marca=Wirt |Descrizione=Alimentatore }} ==...