Piccardi
{{PatentInfo |Inventor=Andrew Stuart Horn |Assignee=Andrew Stuart Horn |Country=GB |ApplicationNum=15130/35 |ApplicationDate=1935-05-24 |PatentNum=454040 |PatentDate=1936-09-23 |PriorityDate=1935-05-24 |Marca=Unbranded |Titolo=Improvements in or relati...