Piccardi
{{PatentInfo |Inventor=Kurt Fend |Assignee=Kurt Fend |Country=US |ApplicationNum=155103 |ApplicationDate=1937-06-22 |PatentNum=2163515 |PatentDate=1938-01-25 |PriorityDate=1936-07-23 |Titolo=Interchangeable lead pencil |Marca=Fend |Descrizione=Matita m...