Piccardi
{{PatentInfo |Inventor=Roy Conklin |Assignee=Roy Conklin |Country=US |ApplicationNum=302441 |ApplicationDate=1906-02-23 |PatentNum=836180 |PatentDate=1906-11-20 |PriorityDate=1906-02-23 |Titolo=Self-filling fountain-pen |Marca=Conklin |Descrizione=Sist...