Record

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Archive Reference / Library Class No.	D6768/2
Title	Letters Patent issued to John Alfred Warwick of Derby, telegraph superintendent, for his invention for the improvement of railway signals
Date	20 Feb 1866
Description	Appended with the great seal
Extent	1 item
Level	Item
Repository	Derbyshire Record Office
Archive Creator	John Alfred Warwick (1821-1896), Railway Telegraph Superintendent, technological innovator, lecturer

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