Piccardi
{{PatentInfo |Inventor=Edwards Ernest Ethelbert |Assignee=Conway Stewart & Co. |Country=GB |ApplicationNum=299/67 |ApplicationDate=1967-01-03 |PatentNum=1150333 |PatentDate=1969-04-30 |PriorityDate=1967-01-03 |Titolo=Improvements in and relating to ba...