Piccardi
{{PatentInfo |Inventor=Andreas Bienenstein |Assignee=The Conklin Pen Manufacturing Company |Country=US |ApplicationNum=497939 |ApplicationDate=1930-11-24 |PatentNum=1902809 |PatentDate=1933-03-28 |PriorityDate=1930-11-24 |Titolo=Plunger type pen |Marca...