Piccardi
{{PatentInfo |Inventor=Leslie William Johnson, Edward Stephen Sears |Assignee=Mabie, Todd & Company Limited |Country=GB |ApplicationNum=12861/37 |ApplicationDate=1937-05-05 |PatentNum=474893 |PatentDate=1937-11-09 |PriorityDate=1937-05-05 |Titolo=Impro...