Piccardi
{{PatentInfo |Inventor=Charles R. Keeran |Assignee=Charles R. Keeran |Country=US |ApplicationNum=869104 |ApplicationDate=1914-10-28 |PatentNum=1151016 |PatentDate=1915-08-24 |PriorityDate=1914-10-28 |Titolo=Lead pencil |Marca=Eversharp |Descrizione=Mat...