Piccardi
{{PatentInfo |Inventor=Arthur O. Dahlberg |Assignee=Arthur O. Dahlberg |Country=US |ApplicationNum=482957 |ApplicationDate=1921-07-07 |PatentNum=1419026 |PatentDate=1922-06-06 |PriorityDate=1921-07-07 |Titolo=Fountain pen |Marca=Unbranded |Descrizione=...