Piccardi
{{PatentInfo |Inventor=John C. Wahl |Assignee=The Wahl Company |Country=US |ApplicationNum=676896 |ApplicationDate=1923-11-26 |PatentNum=1578565 |PatentDate=1926-03-30 |PriorityDate=1923-11-26 |Titolo=Mechanical pencil |Marca=Eversharp |Descrizione=Mat...