| Description | Papers including: correspondence between Cannon and Barker, Brettell & Duncan, Chartered Patent Agents, Birmingham; provisional and complete specifications of Cannon Iron Foundries Ltd., Richard Talbot Clayton and Arthur Frederick Oatley for 'improvements relating to the heating of ovens and hot chambers of gas heated cooking apparatus'; Letters Patent of Patent No. 545873 issued by Barker, Brettell & Duncan to Cannon Iron Foundries Ltd. |