Piccardi
{{PatentInfo |Inventor=Charles R. Keeran |Assignee=Charles R. Keeran |Country=US |ApplicationNum=794508 |ApplicationDate=1913-10-10 |PatentNum=1130741 |PatentDate=1915-03-09 |PriorityDate=1913-10-10 |Titolo=Mechanical pencil |Marca=Eversharp |Descrizio...