Piccardi
{{PatentInfo |Inventor=Roy Conklin |Assignee=Roy Conklin |Country=US |ApplicationNum=196562 |ApplicationDate=1904-03-04 |PatentNum=756778 |PatentDate=1904-04-05 |PriorityDate=1904-03-04 |Titolo=Self-filling fountain-pen |Marca=Conklin |Descrizione=Sist...