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{{PatentInfo |Inventor=William Welty |Assignee=William Welty |Country=US |ApplicationNum=296681 |ApplicationDate=1906-01-18 |PatentNum=834541 |PatentDate=1906-10-30 |PriorityDate=1906-01-18 |Titolo=Fountain pen |Marca=Welty |Descrizione=Alimentatore }}...