Piccardi
{{PatentInfo |Inventor=Andreas Bienenstein |Assignee=The Conklin Pen Manufacturing Company |Country=US |ApplicationNum=672251 |ApplicationDate=1933-05-22 |PatentNum=1937107 |PatentDate=1933-11-28 |PriorityDate=1933-05-22 |Titolo=Twisting filler fountai...