Piccardi
{{PatentInfo |Inventor=Philip C. Hull, George W. Gilman |Assignee=The Parker Pen Company |Country=US |ApplicationNum=739276 |ApplicationDate=1947-03-31 |PatentNum=2504420 |PatentDate=1950-04-18 |PriorityDate=1947-03-31 |Titolo=Magazine pencil with rota...