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John Michael Butt (1817-1885) of J. M. Butt and Co, Kingsholm Iron Foundry, Gloucester.
1844 married at Stroud to Isabella Elizabeth Brisley
1876 Patent. '4126. And John Michael Butt, of Kingsholm, and John Herring, of Newmarket, both in the city of Gloucester, have given the like notice in respect of the invention of "improvements in apparatus used in the purification of gas."'