Piccardi
{{PatentInfo |Inventor=Leon Bagrit |Assignee=Harry C. Stephens Limited |Country=GB |ApplicationNum=33132/55 |ApplicationDate=1955-11-18 |PatentNum=793269 |PatentDate=1958-04-16 |PriorityDate=1955-11-18 |Titolo=Improvements in or relating to reservoir w...