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Sometimes known as I. and R. Blackburn
1857 Patent. '414. To Isaac Blackburn, of Islington, in the county of Middlesex, Engineer, and Robert Blackburn, of the city of Edinburgh, Engineer, for the invention of "improvements in engines or implements to be employed in agriculture, applicable also to the transporting of heavy bodies to the traction of carriages, and to the conveyance of passengers."'
1859 Patent. '1333. To Isaac Blackburn and Robert Blackburn, both of Long Eaton, in the county of Derby, Engineers, for the invention of "improvements in locomotive or traction engines, and in implements connected therewith for cultivating the soil."'