Grace's Guide To British Industrial History

Registered UK Charity (No. 1154342)

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,647 pages of information and 247,064 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.

Harry Robert Mayes

From Graces Guide

Harry Robert Mayes (1895-1970)

1950 Patent. 'Improvements in or relating to the crankcases of internal combustion engines of the type having horizontally opposed cylinders'[1]

1953 Patent. '734,359. Motor power plant; jet propulsion plant'[2]

See Also

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Sources of Information

  1. ↑ https://patents.google.com/patent/DE1023270B
  2. ↑ https://patents.google.com/patent/GB734359A/en
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