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Isaac Evans
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Specific Sealing Or Ventilating Devices For Doors And Windows
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Abstract
6558. Evans, I. March 21. Chimney and ventilating - shaft tops.-A number of rectangular, louvred sections are superposed; all the sides may be louvred or one or more may be blank.
GB190306558D1903-03-211903-03-21Improvements in Chimney Pots and Ventilators for Prevention of Downdraughts and Cure of Smoky Chimneys
ExpiredGB190306558A
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