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Expired
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George Alfred Harvey
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Individual
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Individual
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Publication of GB190801898ApublicationCriticalpatent/GB190801898A/en
1898. Harvey, G. A. Jan. 28. Chimney &c. tops.-Curved extractor blades dare mounted between the usual wind blades a and the cap of a revolving cowl, an annnlar plate c separating one set of blades from the other.
GB190801898D1908-01-281908-01-28An Improved Revolving Cowl for Smoke or Ventilation and the like
ExpiredGB190801898A
(en)