British photographic history

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Does any member of this forum have any knowledge of an Ernest Estcourt 1842-1911. In 1892 he patented “Improvements in Means for Changing Films and Plates in Photographic Cameras.” Was this patent taken up by any manufacturer?  

His later motoring related patents were certainly commercially exploited but was this photographic patent his only venture into photographic inventions?

walkiephotos@yahoo.co.uk

Estcourt%20Photo%20Pat.pdf

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