Piccardi
{{PatentInfo |Inventor=Arthur E. Andrews, Henry S. Bailey |Assignee=Arthur E. Andrews, Henry S. Bailey |Country=GB |ApplicationNum=16108/34 |ApplicationDate=1934-05-30 |PatentNum=439182 |PatentDate=1935-12-02 |PriorityDate=1934-05-30 |Titolo=Improvemen...