Piccardi
{{PatentInfo |Inventor=Paul E. Wirt |Assignee=Paul E. Wirt |Country=US |ApplicationNum=167964 |ApplicationDate=1917-05-11 |PatentNum=1347800 |PatentDate=1920-07-27 |PriorityDate=1917-05-11 |Titolo=Fountain-pen |Marca=Wirt |Descrizione=[[Caricamento a l...