Piccardi
{{PatentInfo |Inventor=William I. Ferris, Edwin F. Britten |Assignee=L. E. Waterman Company |Country=US |ApplicationNum=191505790 |ApplicationDate=1915-04-17 |PatentNum=191505790 |PatentDate=1915-11-18 |PriorityDate=1914-08-17 |Titolo=Improvements in S...