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Julius Griffith, of Brompton Crescent. His patent is dated in December, 1821
1821 Patent for a new arrangement for a locomotive carriage mounted on springs 
1822 'To Julius Griffith, of Brompton Crescent, in the county of Middlesex, Esq. for certain improvement! in steam-carriages, and which steam-carriages are capable of transporting merchandise of all kinds as well as passengers upon common roads without the aid of horses being communications by foreigners and discoveries by himself.'