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{{PatentInfo |Inventor=John Everard Langill,John Toker Langill |Assignee=John Everard Langill,John Toker Langill |Country=GB |ApplicationNum=190400459 |ApplicationDate=1904-01-07 |PatentNum=190400459 |PatentDate=1904-03-17 |PriorityDate=1904-01-07 |Tit...