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{{PatentInfo |Inventor=Robert T. Pollock |Assignee=Pollock Pen Company |Country=US |ApplicationNum=518772 |ApplicationDate=1921-11-30 |PatentNum=1658940 |PatentDate=1928-01-24 |PriorityDate=1921-11-30 |Titolo=Fountain pen |Marca=John Hancock |Descrizi...