Piccardi
{{PatentInfo |Inventor=David Kahn |Assignee=David Kahn Inc |Country=US |ApplicationNum=37089 |ApplicationDate=1935-08-20 |PatentNum=2186027 |PatentDate=1940-01-09 |PriorityDate=1935-08-20 |Titolo=Mechanical pencil |Marca=Wearever |Descrizione=Matita me...