Piccardi
{{PatentInfo |Inventor=Paul E. Wirt |Assignee=Paul E. Wirt |Country=US |ApplicationNum=311421 |ApplicationDate=1906-04-13 |PatentNum=841475 |PatentDate=1907-01-15 |PriorityDate=1906-04-13 |Titolo=Self-filling fountain-pen |Marca=Wirt |Descrizione=Caric...