Piccardi
{{PatentInfo |Inventor=John C. Wahl |Assignee=The Wahl Company |Country=US |ApplicationNum=198294 |ApplicationDate=1917-10-24 |PatentNum=1506795 |PatentDate=1924-09-02 |PriorityDate=1917-10-24 |Titolo=Mechanical pencils |Marca=Eversharp |Descrizione=Ma...