Piccardi
{{PatentInfo |Inventor=Leslie William Johnson, Edward Stephen Sears |Assignee=Mabie, Todd & Company Limited |Country=GB |ApplicationNum=33676/46 |ApplicationDate=1946-11-13 |PatentNum=621822 |PatentDate=1949-04-20 |PriorityDate=1946-11-13 |Titolo=Impro...