Piccardi
{{PatentInfo |Inventor=William Welty |Assignee=William Welty |Country=US |ApplicationNum=429347 |ApplicationDate=1908-04-27 |PatentNum=916513 |PatentDate=1909-03-30 |PriorityDate=1908-04-27 |Titolo=Self-filling Fountain-Pen |Marca=Welty |Descrizione=Si...