Piccardi
{{PatentInfo |Inventor=Edgar E. Nelthorpe, George H. Williamson |Assignee=Edgar E. Nelthorpe, George H. Williamson |Country=US |ApplicationNum=708515 |ApplicationDate=1899-03-10 |PatentNum=632320 |PatentDate=1899-09-05 |PriorityDate=1899-03-10 |Titolo=...