Piccardi
{{PatentInfo |Inventor=Julius Kahn |Assignee=David Kahn Inc |Country=US |ApplicationNum=578388 |ApplicationDate=1931-12-01 |PatentNum=2009182 |PatentDate=1935-07-23 |PriorityDate=1931-12-01 |Titolo=Mechanical pencil |Marca=Wearever |Descrizione=Matita ...