Piccardi
{{PatentInfo |Inventor=Harry C. Johnson, Ernest M. Wade |Assignee=Harry C. Johnson, Ernest M. Wade |Country=FR |ApplicationNum=427646 |ApplicationDate=1910-11-22 |PatentNum=427646 |PatentDate=1911-08-09 |PriorityDate=1910-03-23 |Titolo=Perfectionnement...