Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,124 pages of information and 233,665 images on early companies, their products and the people who designed and built them.

John Martin (1878-1922)

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John Martin (1878-1922), head of the alternating-current design department of BTH

son of James Martin

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