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Expired
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William Thomas Sugg
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Individual
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Publication of GB189724994ApublicationCriticalpatent/GB189724994A/en
24,994. Sugg, W. T. Oct. 28. Ventilating-shaft tops.-A grating of doublybevelled bars b or a plate pierced by an equivalent assemblage of conical holes is introduced into a top.
GB189724994D1897-10-281897-10-28Improvements relating to Ventilating Cowls.
ExpiredGB189724994A
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