Piccardi
{{PatentInfo |Inventor=George W. Perks, Frederick C. Thacker |Assignee=George W. Perks, Frederick C. Thacker |Country=US |ApplicationNum=134146 |ApplicationDate=1902-12-06 |PatentNum=723726 |PatentDate=1903-03-24 |PriorityDate=1902-12-06 |Titolo=Founta...