Piccardi
{{PatentInfo |Inventor=James A. Mustard |Assignee=The Parker Pen Company |Country=US |ApplicationNum=649472 |ApplicationDate=1946-02-23 |PatentNum=2484640 |PatentDate=1949-10-11 |PriorityDate=1946-02-23 |Titolo=Mechanical pencil |Marca=Parker |Descrizi...