Piccardi
{{PatentInfo |Inventor=William P. De Witt |Assignee=De Witt - La France Co. |Country=US |ApplicationNum=530742 |ApplicationDate=1922-01-21 |PatentNum=1537226 |PatentDate=1925-05-12 |PriorityDate=1922-01-21 |Titolo=Lever filler for fountain pens with me...