Piccardi
{{PatentInfo |Inventor=Andreas Bienenstein |Assignee=The Conklin Pen Manufacturing Company |Country=US |ApplicationNum=531567 |ApplicationDate=1931-04-20 |PatentNum=1902810 |PatentDate=1933-03-28 |PriorityDate=1931-04-20 |Titolo=Plunger type pen |Marca...