Grace's Guide To British Industrial History

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Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,699 pages of information and 247,077 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

British Duplex Motor Engine Syndicate

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Revision as of 02:31, 11 April 2018 by Ait (talk | contribs) (Created page with " 1909 December. Letter claiming the rights to the Kelly Duplex Engine and how that of J. H. Hopkins may infringe those rights.<ref>The Autocar 1909/12/25</ref> == S...")
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1909 December. Letter claiming the rights to the Kelly Duplex Engine and how that of J. H. Hopkins may infringe those rights.[1]


See Also

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Sources of Information

  1. ↑ The Autocar 1909/12/25
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