Piccardi
{{PatentInfo |Inventor=Charles R. Keeran |Assignee=Keeran Products Company |Country=US |ApplicationNum=60230 |ApplicationDate=1925-10-25 |PatentNum=1301057 |PatentDate=1928-12-11 |PriorityDate=1925-10-25 |Titolo=Mechanical pencil |Marca=Eversharp |Desc...