Piccardi
{{PatentInfo |Inventor=Herman K. Stempel |Assignee=W. A. Sheaffer Pen Company |Country=US |ApplicationNum=239987 |ApplicationDate=1938-11-12 |PatentNum=2177466 |PatentDate=1939-10-24 |PriorityDate=1938-11-12 |Titolo=Pencil eraser |Marca=Sheaffer |Descr...