Piccardi
{{PatentInfo |Inventor=David W. Beaumel |Assignee=David W. Beaumel |Country=US |ApplicationNum=436966 |ApplicationDate=1921-01-13 |PatentNum=1435446 |PatentDate=1922-11-14 |PriorityDate=1921-01-13 |Titolo=Self-filling fountain pen |Marca=Beaumel |Descr...