Piccardi
{{PatentInfo |Inventor=William Livsey |Assignee=William Livsey |Country=GB |ApplicationNum=36832/32 |ApplicationDate=1932-12-30 |PatentNum=412286 |PatentDate=1934-06-28 |PriorityDate=1932-12-30 |Titolo=Improvements in or relating to pencils |Marca=Lang...