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Archive Reference / Library Class No.D6768/2
TitleLetters Patent issued to John Alfred Warwick of Derby, telegraph superintendent, for his invention for the improvement of railway signals
Date20 Feb 1866
DescriptionAppended with the great seal
Extent1 item
LevelItem
RepositoryDerbyshire Record Office
Archive CreatorJohn Alfred Warwick (1821-1896), Railway Telegraph Superintendent, technological innovator, lecturer
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