Piccardi
{{PatentInfo |Inventor=Andrew Stuart Horn |Assignee=Andrew Stuart Horn |Country=GB |ApplicationNum=15333/33 |ApplicationDate=1933-05-27 |PatentNum=420164 |PatentDate=1934-11-27 |PriorityDate=1933-05-27 |Marca=Unbranded |Titolo=Improvements in or relati...