Piccardi
{{PatentInfo |Inventor=David J. La France, William P. De Witt |Assignee=De Witt - La France Co. |Country=US |ApplicationNum=327840 |ApplicationDate=1919-10-02 |PatentNum=1434684 |PatentDate=1922-11-07 |PriorityDate=1919-10-02 |Titolo=Pencil |Marca=De W...