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US1112725A
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Method of making pipes for chimneys.
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GB191114365A
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A Method of Obviating Cracking and Injurious Stresses in Combined Smoke and Ventillating Chimneys.
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US995097A
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Combined smoke and ventilation shaft.
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Combined smoke and ventilation shaft.
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GB191022519A
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Improvements in the Manufacture of Tubular and like Sections of Chimney Flues.
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Improvements in Combined Smoke and Ventilation Shafts.
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GB190723891A
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Improvements in Chimneys and Ventilating Devices.
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