Grace's Guide

British Industrial History

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Robert Ridley

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Engineer of Low Wortley, Yorkshire.

1861 Patent to William Firth, of Leeds, Merchant, and Robert Ridley, of Leeds Engineer, in respect of the invention of "improvements in apparatus and machinery for working coal and other mines."[1]

1861 Patent to George Edmund Donisthorpe and William Firth, oi Leeds, Merchants, and Robert Ridley, of Leeds, Engineer, in respect of the invention of "improvements inmachinery and apparatus for working coal and other mines."[2]

See Also

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Sources of Information

  1. The London Gazette 25 March 1862
  2. The London Gazette 25 March 1862