Piccardi
{{PatentInfo |Inventor=Robert E. Freidlein, David Juelss |Assignee=American Lead Pencil Company |Country=US |ApplicationNum=53692 |ApplicationDate=1935-12-10 |PatentNum=2110551 |PatentDate=1938-03-08 |PriorityDate=1935-12-10 |Titolo=Mechanical pencil |...