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 133,382 pages of information and 211,458 images on early companies, their products and the people who designed and built them.

Ozonal Laboratories

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of London.

  • 1929 Listed Exhibitor - Additional Late Entry - British Industries Fair. Manufacturers of a Disinfectant Device. (Stand No. M.64) [1]


Sources of Information

  1. 1929 British Industries Fair Pink Insert Page 4