Piccardi
{{PatentInfo |Inventor=Charles George Todd |Assignee=Harry C. Stephens Limited |Country=GB |ApplicationNum=29506/39 |ApplicationDate=1939-11-06 |PatentNum=533420 |PatentDate=1941-02-12 |PriorityDate=1939-11-06 |Titolo=A device for use in the preparatio...