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Date: 1846-1847 Reference: BT 45/5 (993) Creator: Board of Trade and successor and related bodies Catalogue context: Designs 801-1000. (Described at item level). Categories: Medical Subjects: Patents; Art, architecture and design; Trade and commerce Topics: Arts and culture; Health and welfare; International trade and affairs Period: Empire And Industry Copyright information: Copyright clearance for publication is not required, except in the case of documents in third-party copyright. Usage terms: https://www.nationalarchives.gov.uk/documents/information-management/use-of-tna-materials.pdf