Piccardi
{{PatentInfo |Inventor=William P. De Witt |Assignee=William P. De Witt |Country=US |ApplicationNum=626963 |ApplicationDate=1923-03-22 |PatentNum=1490735 |PatentDate=1924-04-15 |PriorityDate=1923-03-22 |Titolo=Fountain pen, lever filler |Marca=De Witt-L...