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{{PatentInfo |Inventor=Ryosuke Namiki |Assignee=Ryosuke Namiki |Country=US |ApplicationNum=549249 |ApplicationDate=1910-03-10 |PatentNum=992234 |PatentDate=1911-05-16 |PriorityDate=1910-03-10 |Titolo=Ruling pen |Marca=Pilot |Descrizione=Un tiralinee a ...