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{{PatentInfo |Inventor=Robert T. Pollock |Assignee=Robert T. Pollock |Country=US |ApplicationNum=548687 |ApplicationDate=1922-04-01 |PatentNum=1574929 |PatentDate=1926-02-02 |PriorityDate=1922-04-01 |Titolo=Fountain pen |Marca=John Hancock |Descrizion...