| Description | Letters Patent No. 21,497, which was marketed as the 'Perfect' Strainer Cover, issued to Richard Clayton, Managing Director of Cannon Iron Foundries Ltd., for 'Improvements in covers of sauce-pans and similar covers of like utensils for the purpose of adapting them to act as strainers when liquid is being poured from the saucepans or like utensils and of preventing boiling over'; provisional specification for the same patent; certificates of renewal of patent; correspondence with various firms about the patent; License of Archibald Kenrick & Sons Ltd. to manufacture the 'Perfect' Strainer Cover; Agreement with Joseph Sankey & Sons of Albert Street Works, Bilston, granting a license to use patent no. 21,497 in the manufacture of kettle covers. |