Piccardi
{{PatentInfo |Inventor=Jozsef Laszlo Biro |Assignee=Luis Lang |Country=US |ApplicationNum=389830 |ApplicationDate=1941-04-23 |PatentNum=2258841 |PatentDate=1941-10-14 |PriorityDate=1941-04-23 |Titolo=Writing instrument |Marca=Eterpen |Descrizione=Penna...