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Samuel's patent continuous expansive locomotive engine. https://www.rawpixel.com/image/13982644/image-background-paper-technologyFree Image from public domain licenseLa Daguerreotypomanie (Daguerreotypomania) by Théodore Maurisset https://www.rawpixel.com/image/14275847/daguerreotypomanie-daguerreotypomania-theodore-maurissetFree Image from public domain licenseBy her majesty's letters patent : comfort for invalids : 8, Denmark St., Soho London / J. 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Sourced from the Library of Congress. https://www.rawpixel.com/image/12327875/image-person-medicine-public-domainFree Image from public domain licenseFarming: a patented steam-driven threshing machine. 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Wood engraving by Walmsley, 1856. https://www.rawpixel.com/image/13974477/image-paper-cartoon-fabricFree Image from public domain licenseClay St. Hill R.R., San Francisco, Cal. Run by A.S. Hallide's patent Endless Steel Wire Rope and Gripping Attachment... by… https://www.rawpixel.com/image/14300014/image-person-art-roadFree Image from public domain license[Untitled photo, possibly related to: Salesman displaying patent medicine to farmers who have brought tobacco to warehouse… https://www.rawpixel.com/image/12319680/image-person-medicine-horseFree Image from public domain licensePullman Palace Sleeping Car (Interior) by Carleton Watkins https://www.rawpixel.com/image/14311616/pullman-palace-sleeping-car-interior-carleton-watkinsFree Image from public domain licenseSpecification of William George Nicholas Manley : ambulance wheeled litter. https://www.rawpixel.com/image/13986990/specification-william-george-nicholas-manley-ambulance-wheeled-litterFree Image from public domain license