Piccardi
{{PatentInfo |Inventor=Edwards Ernest Ethelbert |Assignee=Conway Stewart & Co. |Country=GB |ApplicationNum=49888/64 |ApplicationDate=1964-12-08 |PatentNum=1058094 |PatentDate=1967-02-08 |PriorityDate=1964-12-08 |Titolo=Improvements in and relating to...