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John Edward Kingsbury
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Individual
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Individual
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Publication of GB190920842ApublicationCriticalpatent/GB190920842A/en
20,842. Kingsbury, J. E., [Western Electric Co.]. Sept. 11. Drawings to Specification. Make and - break switches, mechanical. - The Specification describes the same arrangement of a selector for an automatic or semi-automatic exchange telephone system, and a sequence switch for controlling its action, as is described in Specification 20,839/09, but the claims relate only to the method of controlling the movements of the selector.
GB190920842D1909-09-111909-09-11Automatic Selective Switching Apparatus suitable for use in Telephone Systems.
ExpiredGB190920842A
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