Piccardi
{{PatentInfo |Inventor=Duncan Cameron |Assignee=Duncan Cameron, MacNiven and Cameron Waverley Works |Country=GB |ApplicationNum=190828493 |ApplicationDate=1908-12-31 |PatentNum=190828493 |PatentDate=1909-08-19 |PriorityDate=1907-04-10 |Titolo=Improvem...