Grace's Guide

British Industrial History

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Ingram and Stapfer

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1877. Ingram and Stapfer's oil testing apparatus manufactured by W. H. Bailey and Co.

1866 Patent to James Ingram, Merchant, and Heinrich Stapfer, Dentist, both of the city of Manchester, and county of Lancaster, for the invention of "improvements in apparatus for testing the lubricity of oils and other lubricants."[1]


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Sources of Information

  1. London Gazette 7 December 1866