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of 6 Holland Street, Blackfriars, and Greenwich.
Established by George Rennie.
c.1850 John Keith Rennie reached the age of 21.
1851 George Rennie exhibited models of various bridges at the 1851 Great Exhibition
c.1853 George Banks Rennie reached the age of 21. Presumably at this time the company of George Rennie and Sons was incorporated.
1855 Patent to George Rennie, of the firm of George Rennie, John Keith Rennie, and George Banks Rennie, of Holland-street, Blackfriars, Engineers, for the invention of "improvements in steam engine boilers as applied to the propulsion of vessels."
1856 G. Rennie and Co (sic), engineers, of Holland St, Blackfriars, subscribed £20 to the Smith Testimonial Fund, commemorating the work of F. P. Smith in promoting the screw propeller.
1860 Patent to George Banks Rennie, of the firm of George Rennie and Sons, Holland-street, Blackfriars, Engineer, in respect of the invention of "improvements in the construction and mode of working and employing floating platforms, pontoons, or docks for supporting ships or other vessels."
1861 Patent to George Banks Rennie, of the firm of George Rennie and Sons, Holland-street, Blackfriars, Civil Engineer, in respect of the invention of "improvements in machinery, apparatus, and works of construction intended to be employed, and the mode or method of using or employing the same, for the purpose of examining or repairing ships and other vessels."
1862 London Exhibition: Marine condensing engine for screw propellers, high and low pressure, with surface condensation.
1862 Partnership change. '...the Partnership hitherto subsisting between the undersigned, George Rennie, John Keith Rennie, and George Banks Rennie, carrying on business as Engineers, under the style or firm of George Rennie and Sons, at Holland-street, Blackfriars-road, in the county of Surrey, and at Greenwich, in the county of Kent, is dissolved by mutual consent, as from the 31st of December, 1861, the said George Rennie retiring from the business, which will be continued by the said John Keith Rennie and George Banks Rennie...'
See J. and G. Rennie