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c.1804 Born in Keighley, presumably son of William Smith
1858 Patent to Benjamin Foster, of Denholme, near Bradford, in the county of York, Spinner, and Prince Smith, of Keighley, in the county of York, Machinist, for the invention of "improvements in machinery or apparatus for spinning and doubling wool, alpaca, mohair, cotton, silk, flax, and other fibrous substances."
1860 Patent by William Smith and Prince Smith, both of Keighley, in the county of York, Machine Makers, in respect of the invention of "an improved process of hardening cast iron caps used in machinery for spinning and doubling wool, cotton, silk, flax, mohair, and other fibrous substances." 
1866 Patent to Prince Smith the elder, of Keighley, in the county of York, Gentleman, for an invention of "improvements in weighting top pressing rollers for dandy roving and spinning of wool, worsted," silk, mohair, alpaca, and other fibrous substances
1866 Patent to Robert Clough, of Grove-mill, in the parish of Keighley, in the county of York, Worsted Spinner and Manufacturer, and Prince Smith the elder, of Holly House, in the said parish, Machine Maker, for the invention of "an improved method of, and apparatus for, lubricating the spindles of cap spinning and doubling frames, which apparatus is also applicable as a cleaner to flyer, spinning, and doubling frames."